FM / Carbon

/home/techb158/exp.abdallabala.com/vendor/nesbot/carbon/src/Carbon/

/home/techb158/exp.abdallabala.com/vendor/nesbot/carbon/src/Carbon

Name	Size	Mode	Actions
Cli/	-	0755	rm
Doctrine/	-	0755	rm
Exceptions/	-	0755	rm
Lang/	-	0755	rm
Laravel/	-	0755	rm
List/	-	0755	rm
PHPStan/	-	0755	rm
Traits/	-	0755	rm
Carbon.php	94714	0644	edit dl rm
CarbonConverterInterface.php	416	0644	edit dl rm
CarbonImmutable.php	98928	0644	edit dl rm
CarbonInterface.php	240934	0644	edit dl rm
CarbonInterval.php	90354	0644	edit dl rm
CarbonPeriod.php	74939	0644	edit dl rm
CarbonTimeZone.php	8372	0644	edit dl rm
Factory.php	54188	0644	edit dl rm
FactoryImmutable.php	52278	0644	edit dl rm
Language.php	7266	0644	edit dl rm
Translator.php	10388	0644	edit dl rm

Edit: /home/techb158/exp.abdallabala.com/vendor/nesbot/carbon/src/Carbon/CarbonInterface.php (240934B)

<?php

/**
 * This file is part of the Carbon package.
 *
 * (c) Brian Nesbitt <brian@nesbot.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Carbon;

use BadMethodCallException;
use Carbon\Exceptions\BadComparisonUnitException;
use Carbon\Exceptions\ImmutableException;
use Carbon\Exceptions\InvalidDateException;
use Carbon\Exceptions\InvalidFormatException;
use Carbon\Exceptions\UnknownGetterException;
use Carbon\Exceptions\UnknownMethodException;
use Carbon\Exceptions\UnknownSetterException;
use Closure;
use DateInterval;
use DateTime;
use DateTimeImmutable;
use DateTimeInterface;
use DateTimeZone;
use JsonSerializable;
use ReflectionException;
use Throwable;

/**
 * Common interface for Carbon and CarbonImmutable.
 *
 * <autodoc generated by `composer phpdoc`>
 *
 * @property      int              $year
 * @property      int              $yearIso
 * @property      int              $month
 * @property      int              $day
 * @property      int              $hour
 * @property      int              $minute
 * @property      int              $second
 * @property      int              $micro
 * @property      int              $microsecond
 * @property      int|float|string $timestamp                                                                         seconds since the Unix Epoch
 * @property      string           $englishDayOfWeek                                                                  the day of week in English
 * @property      string           $shortEnglishDayOfWeek                                                             the abbreviated day of week in English
 * @property      string           $englishMonth                                                                      the month in English
 * @property      string           $shortEnglishMonth                                                                 the abbreviated month in English
 * @property      string           $localeDayOfWeek                                                                   the day of week in current locale LC_TIME
 * @property      string           $shortLocaleDayOfWeek                                                              the abbreviated day of week in current locale LC_TIME
 * @property      string           $localeMonth                                                                       the month in current locale LC_TIME
 * @property      string           $shortLocaleMonth                                                                  the abbreviated month in current locale LC_TIME
 * @property      int              $milliseconds
 * @property      int              $millisecond
 * @property      int              $milli
 * @property      int              $week                                                                              1 through 53
 * @property      int              $isoWeek                                                                           1 through 53
 * @property      int              $weekYear                                                                          year according to week format
 * @property      int              $isoWeekYear                                                                       year according to ISO week format
 * @property      int              $dayOfYear                                                                         1 through 366
 * @property      int              $age                                                                               does a diffInYears() with default parameters
 * @property      int              $offset                                                                            the timezone offset in seconds from UTC
 * @property      int              $offsetMinutes                                                                     the timezone offset in minutes from UTC
 * @property      int              $offsetHours                                                                       the timezone offset in hours from UTC
 * @property      CarbonTimeZone   $timezone                                                                          the current timezone
 * @property      CarbonTimeZone   $tz                                                                                alias of $timezone
 * @property-read int              $dayOfWeek                                                                         0 (for Sunday) through 6 (for Saturday)
 * @property-read int              $dayOfWeekIso                                                                      1 (for Monday) through 7 (for Sunday)
 * @property-read int              $weekOfYear                                                                        ISO-8601 week number of year, weeks starting on Monday
 * @property-read int              $daysInMonth                                                                       number of days in the given month
 * @property-read string           $latinMeridiem                                                                     "am"/"pm" (Ante meridiem or Post meridiem latin lowercase mark)
 * @property-read string           $latinUpperMeridiem                                                                "AM"/"PM" (Ante meridiem or Post meridiem latin uppercase mark)
 * @property-read string           $timezoneAbbreviatedName                                                           the current timezone abbreviated name
 * @property-read string           $tzAbbrName                                                                        alias of $timezoneAbbreviatedName
 * @property-read string           $dayName                                                                           long name of weekday translated according to Carbon locale, in english if no translation available for current language
 * @property-read string           $shortDayName                                                                      short name of weekday translated according to Carbon locale, in english if no translation available for current language
 * @property-read string           $minDayName                                                                        very short name of weekday translated according to Carbon locale, in english if no translation available for current language
 * @property-read string           $monthName                                                                         long name of month translated according to Carbon locale, in english if no translation available for current language
 * @property-read string           $shortMonthName                                                                    short name of month translated according to Carbon locale, in english if no translation available for current language
 * @property-read string           $meridiem                                                                          lowercase meridiem mark translated according to Carbon locale, in latin if no translation available for current language
 * @property-read string           $upperMeridiem                                                                     uppercase meridiem mark translated according to Carbon locale, in latin if no translation available for current language
 * @property-read int              $noZeroHour                                                                        current hour from 1 to 24
 * @property-read int              $weeksInYear                                                                       51 through 53
 * @property-read int              $isoWeeksInYear                                                                    51 through 53
 * @property-read int              $weekOfMonth                                                                       1 through 5
 * @property-read int              $weekNumberInMonth                                                                 1 through 5
 * @property-read int              $firstWeekDay                                                                      0 through 6
 * @property-read int              $lastWeekDay                                                                       0 through 6
 * @property-read int              $daysInYear                                                                        365 or 366
 * @property-read int              $quarter                                                                           the quarter of this instance, 1 - 4
 * @property-read int              $decade                                                                            the decade of this instance
 * @property-read int              $century                                                                           the century of this instance
 * @property-read int              $millennium                                                                        the millennium of this instance
 * @property-read bool             $dst                                                                               daylight savings time indicator, true if DST, false otherwise
 * @property-read bool             $local                                                                             checks if the timezone is local, true if local, false otherwise
 * @property-read bool             $utc                                                                               checks if the timezone is UTC, true if UTC, false otherwise
 * @property-read string           $timezoneName                                                                      the current timezone name
 * @property-read string           $tzName                                                                            alias of $timezoneName
 * @property-read string           $locale                                                                            locale of the current instance
 *
 * @method        bool             isUtc()                                                                            Check if the current instance has UTC timezone. (Both isUtc and isUTC cases are valid.)
 * @method        bool             isLocal()                                                                          Check if the current instance has non-UTC timezone.
 * @method        bool             isValid()                                                                          Check if the current instance is a valid date.
 * @method        bool             isDST()                                                                            Check if the current instance is in a daylight saving time.
 * @method        bool             isSunday()                                                                         Checks if the instance day is sunday.
 * @method        bool             isMonday()                                                                         Checks if the instance day is monday.
 * @method        bool             isTuesday()                                                                        Checks if the instance day is tuesday.
 * @method        bool             isWednesday()                                                                      Checks if the instance day is wednesday.
 * @method        bool             isThursday()                                                                       Checks if the instance day is thursday.
 * @method        bool             isFriday()                                                                         Checks if the instance day is friday.
 * @method        bool             isSaturday()                                                                       Checks if the instance day is saturday.
 * @method        bool             isSameYear(Carbon|DateTimeInterface|string|null $date = null)                      Checks if the given date is in the same year as the instance. If null passed, compare to now (with the same timezone).
 * @method        bool             isCurrentYear()                                                                    Checks if the instance is in the same year as the current moment.
 * @method        bool             isNextYear()                                                                       Checks if the instance is in the same year as the current moment next year.
 * @method        bool             isLastYear()                                                                       Checks if the instance is in the same year as the current moment last year.
 * @method        bool             isSameWeek(Carbon|DateTimeInterface|string|null $date = null)                      Checks if the given date is in the same week as the instance. If null passed, compare to now (with the same timezone).
 * @method        bool             isCurrentWeek()                                                                    Checks if the instance is in the same week as the current moment.
 * @method        bool             isNextWeek()                                                                       Checks if the instance is in the same week as the current moment next week.
 * @method        bool             isLastWeek()                                                                       Checks if the instance is in the same week as the current moment last week.
 * @method        bool             isSameDay(Carbon|DateTimeInterface|string|null $date = null)                       Checks if the given date is in the same day as the instance. If null passed, compare to now (with the same timezone).
 * @method        bool             isCurrentDay()                                                                     Checks if the instance is in the same day as the current moment.
 * @method        bool             isNextDay()                                                                        Checks if the instance is in the same day as the current moment next day.
 * @method        bool             isLastDay()                                                                        Checks if the instance is in the same day as the current moment last day.
 * @method        bool             isSameHour(Carbon|DateTimeInterface|string|null $date = null)                      Checks if the given date is in the same hour as the instance. If null passed, compare to now (with the same timezone).
 * @method        bool             isCurrentHour()                                                                    Checks if the instance is in the same hour as the current moment.
 * @method        bool             isNextHour()                                                                       Checks if the instance is in the same hour as the current moment next hour.
 * @method        bool             isLastHour()                                                                       Checks if the instance is in the same hour as the current moment last hour.
 * @method        bool             isSameMinute(Carbon|DateTimeInterface|string|null $date = null)                    Checks if the given date is in the same minute as the instance. If null passed, compare to now (with the same timezone).
 * @method        bool             isCurrentMinute()                                                                  Checks if the instance is in the same minute as the current moment.
 * @method        bool             isNextMinute()                                                                     Checks if the instance is in the same minute as the current moment next minute.
 * @method        bool             isLastMinute()                                                                     Checks if the instance is in the same minute as the current moment last minute.
 * @method        bool             isSameSecond(Carbon|DateTimeInterface|string|null $date = null)                    Checks if the given date is in the same second as the instance. If null passed, compare to now (with the same timezone).
 * @method        bool             isCurrentSecond()                                                                  Checks if the instance is in the same second as the current moment.
 * @method        bool             isNextSecond()                                                                     Checks if the instance is in the same second as the current moment next second.
 * @method        bool             isLastSecond()                                                                     Checks if the instance is in the same second as the current moment last second.
 * @method        bool             isSameMicro(Carbon|DateTimeInterface|string|null $date = null)                     Checks if the given date is in the same microsecond as the instance. If null passed, compare to now (with the same timezone).
 * @method        bool             isCurrentMicro()                                                                   Checks if the instance is in the same microsecond as the current moment.
 * @method        bool             isNextMicro()                                                                      Checks if the instance is in the same microsecond as the current moment next microsecond.
 * @method        bool             isLastMicro()                                                                      Checks if the instance is in the same microsecond as the current moment last microsecond.
 * @method        bool             isSameMicrosecond(Carbon|DateTimeInterface|string|null $date = null)               Checks if the given date is in the same microsecond as the instance. If null passed, compare to now (with the same timezone).
 * @method        bool             isCurrentMicrosecond()                                                             Checks if the instance is in the same microsecond as the current moment.
 * @method        bool             isNextMicrosecond()                                                                Checks if the instance is in the same microsecond as the current moment next microsecond.
 * @method        bool             isLastMicrosecond()                                                                Checks if the instance is in the same microsecond as the current moment last microsecond.
 * @method        bool             isCurrentMonth()                                                                   Checks if the instance is in the same month as the current moment.
 * @method        bool             isNextMonth()                                                                      Checks if the instance is in the same month as the current moment next month.
 * @method        bool             isLastMonth()                                                                      Checks if the instance is in the same month as the current moment last month.
 * @method        bool             isCurrentQuarter()                                                                 Checks if the instance is in the same quarter as the current moment.
 * @method        bool             isNextQuarter()                                                                    Checks if the instance is in the same quarter as the current moment next quarter.
 * @method        bool             isLastQuarter()                                                                    Checks if the instance is in the same quarter as the current moment last quarter.
 * @method        bool             isSameDecade(Carbon|DateTimeInterface|string|null $date = null)                    Checks if the given date is in the same decade as the instance. If null passed, compare to now (with the same timezone).
 * @method        bool             isCurrentDecade()                                                                  Checks if the instance is in the same decade as the current moment.
 * @method        bool             isNextDecade()                                                                     Checks if the instance is in the same decade as the current moment next decade.
 * @method        bool             isLastDecade()                                                                     Checks if the instance is in the same decade as the current moment last decade.
 * @method        bool             isSameCentury(Carbon|DateTimeInterface|string|null $date = null)                   Checks if the given date is in the same century as the instance. If null passed, compare to now (with the same timezone).
 * @method        bool             isCurrentCentury()                                                                 Checks if the instance is in the same century as the current moment.
 * @method        bool             isNextCentury()                                                                    Checks if the instance is in the same century as the current moment next century.
 * @method        bool             isLastCentury()                                                                    Checks if the instance is in the same century as the current moment last century.
 * @method        bool             isSameMillennium(Carbon|DateTimeInterface|string|null $date = null)                Checks if the given date is in the same millennium as the instance. If null passed, compare to now (with the same timezone).
 * @method        bool             isCurrentMillennium()                                                              Checks if the instance is in the same millennium as the current moment.
 * @method        bool             isNextMillennium()                                                                 Checks if the instance is in the same millennium as the current moment next millennium.
 * @method        bool             isLastMillennium()                                                                 Checks if the instance is in the same millennium as the current moment last millennium.
 * @method        CarbonInterface  years(int $value)                                                                  Set current instance year to the given value.
 * @method        CarbonInterface  year(int $value)                                                                   Set current instance year to the given value.
 * @method        CarbonInterface  setYears(int $value)                                                               Set current instance year to the given value.
 * @method        CarbonInterface  setYear(int $value)                                                                Set current instance year to the given value.
 * @method        CarbonInterface  months(int $value)                                                                 Set current instance month to the given value.
 * @method        CarbonInterface  month(int $value)                                                                  Set current instance month to the given value.
 * @method        CarbonInterface  setMonths(int $value)                                                              Set current instance month to the given value.
 * @method        CarbonInterface  setMonth(int $value)                                                               Set current instance month to the given value.
 * @method        CarbonInterface  days(int $value)                                                                   Set current instance day to the given value.
 * @method        CarbonInterface  day(int $value)                                                                    Set current instance day to the given value.
 * @method        CarbonInterface  setDays(int $value)                                                                Set current instance day to the given value.
 * @method        CarbonInterface  setDay(int $value)                                                                 Set current instance day to the given value.
 * @method        CarbonInterface  hours(int $value)                                                                  Set current instance hour to the given value.
 * @method        CarbonInterface  hour(int $value)                                                                   Set current instance hour to the given value.
 * @method        CarbonInterface  setHours(int $value)                                                               Set current instance hour to the given value.
 * @method        CarbonInterface  setHour(int $value)                                                                Set current instance hour to the given value.
 * @method        CarbonInterface  minutes(int $value)                                                                Set current instance minute to the given value.
 * @method        CarbonInterface  minute(int $value)                                                                 Set current instance minute to the given value.
 * @method        CarbonInterface  setMinutes(int $value)                                                             Set current instance minute to the given value.
 * @method        CarbonInterface  setMinute(int $value)                                                              Set current instance minute to the given value.
 * @method        CarbonInterface  seconds(int $value)                                                                Set current instance second to the given value.
 * @method        CarbonInterface  second(int $value)                                                                 Set current instance second to the given value.
 * @method        CarbonInterface  setSeconds(int $value)                                                             Set current instance second to the given value.
 * @method        CarbonInterface  setSecond(int $value)                                                              Set current instance second to the given value.
 * @method        CarbonInterface  millis(int $value)                                                                 Set current instance millisecond to the given value.
 * @method        CarbonInterface  milli(int $value)                                                                  Set current instance millisecond to the given value.
 * @method        CarbonInterface  setMillis(int $value)                                                              Set current instance millisecond to the given value.
 * @method        CarbonInterface  setMilli(int $value)                                                               Set current instance millisecond to the given value.
 * @method        CarbonInterface  milliseconds(int $value)                                                           Set current instance millisecond to the given value.
 * @method        CarbonInterface  millisecond(int $value)                                                            Set current instance millisecond to the given value.
 * @method        CarbonInterface  setMilliseconds(int $value)                                                        Set current instance millisecond to the given value.
 * @method        CarbonInterface  setMillisecond(int $value)                                                         Set current instance millisecond to the given value.
 * @method        CarbonInterface  micros(int $value)                                                                 Set current instance microsecond to the given value.
 * @method        CarbonInterface  micro(int $value)                                                                  Set current instance microsecond to the given value.
 * @method        CarbonInterface  setMicros(int $value)                                                              Set current instance microsecond to the given value.
 * @method        CarbonInterface  setMicro(int $value)                                                               Set current instance microsecond to the given value.
 * @method        CarbonInterface  microseconds(int $value)                                                           Set current instance microsecond to the given value.
 * @method        CarbonInterface  microsecond(int $value)                                                            Set current instance microsecond to the given value.
 * @method        CarbonInterface  setMicroseconds(int $value)                                                        Set current instance microsecond to the given value.
 * @method        CarbonInterface  setMicrosecond(int $value)                                                         Set current instance microsecond to the given value.
 * @method        CarbonInterface  addYears(int $value = 1)                                                           Add years (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  addYear()                                                                          Add one year to the instance (using date interval).
 * @method        CarbonInterface  subYears(int $value = 1)                                                           Sub years (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  subYear()                                                                          Sub one year to the instance (using date interval).
 * @method        CarbonInterface  addYearsWithOverflow(int $value = 1)                                               Add years (the $value count passed in) to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  addYearWithOverflow()                                                              Add one year to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  subYearsWithOverflow(int $value = 1)                                               Sub years (the $value count passed in) to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  subYearWithOverflow()                                                              Sub one year to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  addYearsWithoutOverflow(int $value = 1)                                            Add years (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addYearWithoutOverflow()                                                           Add one year to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subYearsWithoutOverflow(int $value = 1)                                            Sub years (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subYearWithoutOverflow()                                                           Sub one year to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addYearsWithNoOverflow(int $value = 1)                                             Add years (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addYearWithNoOverflow()                                                            Add one year to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subYearsWithNoOverflow(int $value = 1)                                             Sub years (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subYearWithNoOverflow()                                                            Sub one year to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addYearsNoOverflow(int $value = 1)                                                 Add years (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addYearNoOverflow()                                                                Add one year to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subYearsNoOverflow(int $value = 1)                                                 Sub years (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subYearNoOverflow()                                                                Sub one year to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addMonths(int $value = 1)                                                          Add months (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  addMonth()                                                                         Add one month to the instance (using date interval).
 * @method        CarbonInterface  subMonths(int $value = 1)                                                          Sub months (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  subMonth()                                                                         Sub one month to the instance (using date interval).
 * @method        CarbonInterface  addMonthsWithOverflow(int $value = 1)                                              Add months (the $value count passed in) to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  addMonthWithOverflow()                                                             Add one month to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  subMonthsWithOverflow(int $value = 1)                                              Sub months (the $value count passed in) to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  subMonthWithOverflow()                                                             Sub one month to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  addMonthsWithoutOverflow(int $value = 1)                                           Add months (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addMonthWithoutOverflow()                                                          Add one month to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subMonthsWithoutOverflow(int $value = 1)                                           Sub months (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subMonthWithoutOverflow()                                                          Sub one month to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addMonthsWithNoOverflow(int $value = 1)                                            Add months (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addMonthWithNoOverflow()                                                           Add one month to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subMonthsWithNoOverflow(int $value = 1)                                            Sub months (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subMonthWithNoOverflow()                                                           Sub one month to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addMonthsNoOverflow(int $value = 1)                                                Add months (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addMonthNoOverflow()                                                               Add one month to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subMonthsNoOverflow(int $value = 1)                                                Sub months (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subMonthNoOverflow()                                                               Sub one month to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addDays(int $value = 1)                                                            Add days (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  addDay()                                                                           Add one day to the instance (using date interval).
 * @method        CarbonInterface  subDays(int $value = 1)                                                            Sub days (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  subDay()                                                                           Sub one day to the instance (using date interval).
 * @method        CarbonInterface  addHours(int $value = 1)                                                           Add hours (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  addHour()                                                                          Add one hour to the instance (using date interval).
 * @method        CarbonInterface  subHours(int $value = 1)                                                           Sub hours (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  subHour()                                                                          Sub one hour to the instance (using date interval).
 * @method        CarbonInterface  addMinutes(int $value = 1)                                                         Add minutes (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  addMinute()                                                                        Add one minute to the instance (using date interval).
 * @method        CarbonInterface  subMinutes(int $value = 1)                                                         Sub minutes (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  subMinute()                                                                        Sub one minute to the instance (using date interval).
 * @method        CarbonInterface  addSeconds(int $value = 1)                                                         Add seconds (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  addSecond()                                                                        Add one second to the instance (using date interval).
 * @method        CarbonInterface  subSeconds(int $value = 1)                                                         Sub seconds (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  subSecond()                                                                        Sub one second to the instance (using date interval).
 * @method        CarbonInterface  addMillis(int $value = 1)                                                          Add milliseconds (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  addMilli()                                                                         Add one millisecond to the instance (using date interval).
 * @method        CarbonInterface  subMillis(int $value = 1)                                                          Sub milliseconds (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  subMilli()                                                                         Sub one millisecond to the instance (using date interval).
 * @method        CarbonInterface  addMilliseconds(int $value = 1)                                                    Add milliseconds (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  addMillisecond()                                                                   Add one millisecond to the instance (using date interval).
 * @method        CarbonInterface  subMilliseconds(int $value = 1)                                                    Sub milliseconds (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  subMillisecond()                                                                   Sub one millisecond to the instance (using date interval).
 * @method        CarbonInterface  addMicros(int $value = 1)                                                          Add microseconds (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  addMicro()                                                                         Add one microsecond to the instance (using date interval).
 * @method        CarbonInterface  subMicros(int $value = 1)                                                          Sub microseconds (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  subMicro()                                                                         Sub one microsecond to the instance (using date interval).
 * @method        CarbonInterface  addMicroseconds(int $value = 1)                                                    Add microseconds (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  addMicrosecond()                                                                   Add one microsecond to the instance (using date interval).
 * @method        CarbonInterface  subMicroseconds(int $value = 1)                                                    Sub microseconds (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  subMicrosecond()                                                                   Sub one microsecond to the instance (using date interval).
 * @method        CarbonInterface  addMillennia(int $value = 1)                                                       Add millennia (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  addMillennium()                                                                    Add one millennium to the instance (using date interval).
 * @method        CarbonInterface  subMillennia(int $value = 1)                                                       Sub millennia (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  subMillennium()                                                                    Sub one millennium to the instance (using date interval).
 * @method        CarbonInterface  addMillenniaWithOverflow(int $value = 1)                                           Add millennia (the $value count passed in) to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  addMillenniumWithOverflow()                                                        Add one millennium to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  subMillenniaWithOverflow(int $value = 1)                                           Sub millennia (the $value count passed in) to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  subMillenniumWithOverflow()                                                        Sub one millennium to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  addMillenniaWithoutOverflow(int $value = 1)                                        Add millennia (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addMillenniumWithoutOverflow()                                                     Add one millennium to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subMillenniaWithoutOverflow(int $value = 1)                                        Sub millennia (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subMillenniumWithoutOverflow()                                                     Sub one millennium to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addMillenniaWithNoOverflow(int $value = 1)                                         Add millennia (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addMillenniumWithNoOverflow()                                                      Add one millennium to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subMillenniaWithNoOverflow(int $value = 1)                                         Sub millennia (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subMillenniumWithNoOverflow()                                                      Sub one millennium to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addMillenniaNoOverflow(int $value = 1)                                             Add millennia (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addMillenniumNoOverflow()                                                          Add one millennium to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subMillenniaNoOverflow(int $value = 1)                                             Sub millennia (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subMillenniumNoOverflow()                                                          Sub one millennium to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addCenturies(int $value = 1)                                                       Add centuries (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  addCentury()                                                                       Add one century to the instance (using date interval).
 * @method        CarbonInterface  subCenturies(int $value = 1)                                                       Sub centuries (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  subCentury()                                                                       Sub one century to the instance (using date interval).
 * @method        CarbonInterface  addCenturiesWithOverflow(int $value = 1)                                           Add centuries (the $value count passed in) to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  addCenturyWithOverflow()                                                           Add one century to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  subCenturiesWithOverflow(int $value = 1)                                           Sub centuries (the $value count passed in) to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  subCenturyWithOverflow()                                                           Sub one century to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  addCenturiesWithoutOverflow(int $value = 1)                                        Add centuries (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addCenturyWithoutOverflow()                                                        Add one century to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subCenturiesWithoutOverflow(int $value = 1)                                        Sub centuries (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subCenturyWithoutOverflow()                                                        Sub one century to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addCenturiesWithNoOverflow(int $value = 1)                                         Add centuries (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addCenturyWithNoOverflow()                                                         Add one century to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subCenturiesWithNoOverflow(int $value = 1)                                         Sub centuries (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subCenturyWithNoOverflow()                                                         Sub one century to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addCenturiesNoOverflow(int $value = 1)                                             Add centuries (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addCenturyNoOverflow()                                                             Add one century to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subCenturiesNoOverflow(int $value = 1)                                             Sub centuries (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subCenturyNoOverflow()                                                             Sub one century to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addDecades(int $value = 1)                                                         Add decades (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  addDecade()                                                                        Add one decade to the instance (using date interval).
 * @method        CarbonInterface  subDecades(int $value = 1)                                                         Sub decades (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  subDecade()                                                                        Sub one decade to the instance (using date interval).
 * @method        CarbonInterface  addDecadesWithOverflow(int $value = 1)                                             Add decades (the $value count passed in) to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  addDecadeWithOverflow()                                                            Add one decade to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  subDecadesWithOverflow(int $value = 1)                                             Sub decades (the $value count passed in) to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  subDecadeWithOverflow()                                                            Sub one decade to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  addDecadesWithoutOverflow(int $value = 1)                                          Add decades (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addDecadeWithoutOverflow()                                                         Add one decade to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subDecadesWithoutOverflow(int $value = 1)                                          Sub decades (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subDecadeWithoutOverflow()                                                         Sub one decade to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addDecadesWithNoOverflow(int $value = 1)                                           Add decades (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addDecadeWithNoOverflow()                                                          Add one decade to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subDecadesWithNoOverflow(int $value = 1)                                           Sub decades (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subDecadeWithNoOverflow()                                                          Sub one decade to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addDecadesNoOverflow(int $value = 1)                                               Add decades (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addDecadeNoOverflow()                                                              Add one decade to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subDecadesNoOverflow(int $value = 1)                                               Sub decades (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subDecadeNoOverflow()                                                              Sub one decade to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addQuarters(int $value = 1)                                                        Add quarters (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  addQuarter()                                                                       Add one quarter to the instance (using date interval).
 * @method        CarbonInterface  subQuarters(int $value = 1)                                                        Sub quarters (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  subQuarter()                                                                       Sub one quarter to the instance (using date interval).
 * @method        CarbonInterface  addQuartersWithOverflow(int $value = 1)                                            Add quarters (the $value count passed in) to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  addQuarterWithOverflow()                                                           Add one quarter to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  subQuartersWithOverflow(int $value = 1)                                            Sub quarters (the $value count passed in) to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  subQuarterWithOverflow()                                                           Sub one quarter to the instance (using date interval) with overflow explicitly allowed.
 * @method        CarbonInterface  addQuartersWithoutOverflow(int $value = 1)                                         Add quarters (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addQuarterWithoutOverflow()                                                        Add one quarter to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subQuartersWithoutOverflow(int $value = 1)                                         Sub quarters (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subQuarterWithoutOverflow()                                                        Sub one quarter to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addQuartersWithNoOverflow(int $value = 1)                                          Add quarters (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addQuarterWithNoOverflow()                                                         Add one quarter to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subQuartersWithNoOverflow(int $value = 1)                                          Sub quarters (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subQuarterWithNoOverflow()                                                         Sub one quarter to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addQuartersNoOverflow(int $value = 1)                                              Add quarters (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addQuarterNoOverflow()                                                             Add one quarter to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subQuartersNoOverflow(int $value = 1)                                              Sub quarters (the $value count passed in) to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  subQuarterNoOverflow()                                                             Sub one quarter to the instance (using date interval) with overflow explicitly forbidden.
 * @method        CarbonInterface  addWeeks(int $value = 1)                                                           Add weeks (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  addWeek()                                                                          Add one week to the instance (using date interval).
 * @method        CarbonInterface  subWeeks(int $value = 1)                                                           Sub weeks (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  subWeek()                                                                          Sub one week to the instance (using date interval).
 * @method        CarbonInterface  addWeekdays(int $value = 1)                                                        Add weekdays (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  addWeekday()                                                                       Add one weekday to the instance (using date interval).
 * @method        CarbonInterface  subWeekdays(int $value = 1)                                                        Sub weekdays (the $value count passed in) to the instance (using date interval).
 * @method        CarbonInterface  subWeekday()                                                                       Sub one weekday to the instance (using date interval).
 * @method        CarbonInterface  addRealMicros(int $value = 1)                                                      Add microseconds (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  addRealMicro()                                                                     Add one microsecond to the instance (using timestamp).
 * @method        CarbonInterface  subRealMicros(int $value = 1)                                                      Sub microseconds (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  subRealMicro()                                                                     Sub one microsecond to the instance (using timestamp).
 * @method        CarbonPeriod     microsUntil($endDate = null, int $factor = 1)                                      Return an iterable period from current date to given end (string, DateTime or Carbon instance) for each microsecond or every X microseconds if a factor is given.
 * @method        CarbonInterface  addRealMicroseconds(int $value = 1)                                                Add microseconds (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  addRealMicrosecond()                                                               Add one microsecond to the instance (using timestamp).
 * @method        CarbonInterface  subRealMicroseconds(int $value = 1)                                                Sub microseconds (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  subRealMicrosecond()                                                               Sub one microsecond to the instance (using timestamp).
 * @method        CarbonPeriod     microsecondsUntil($endDate = null, int $factor = 1)                                Return an iterable period from current date to given end (string, DateTime or Carbon instance) for each microsecond or every X microseconds if a factor is given.
 * @method        CarbonInterface  addRealMillis(int $value = 1)                                                      Add milliseconds (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  addRealMilli()                                                                     Add one millisecond to the instance (using timestamp).
 * @method        CarbonInterface  subRealMillis(int $value = 1)                                                      Sub milliseconds (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  subRealMilli()                                                                     Sub one millisecond to the instance (using timestamp).
 * @method        CarbonPeriod     millisUntil($endDate = null, int $factor = 1)                                      Return an iterable period from current date to given end (string, DateTime or Carbon instance) for each millisecond or every X milliseconds if a factor is given.
 * @method        CarbonInterface  addRealMilliseconds(int $value = 1)                                                Add milliseconds (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  addRealMillisecond()                                                               Add one millisecond to the instance (using timestamp).
 * @method        CarbonInterface  subRealMilliseconds(int $value = 1)                                                Sub milliseconds (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  subRealMillisecond()                                                               Sub one millisecond to the instance (using timestamp).
 * @method        CarbonPeriod     millisecondsUntil($endDate = null, int $factor = 1)                                Return an iterable period from current date to given end (string, DateTime or Carbon instance) for each millisecond or every X milliseconds if a factor is given.
 * @method        CarbonInterface  addRealSeconds(int $value = 1)                                                     Add seconds (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  addRealSecond()                                                                    Add one second to the instance (using timestamp).
 * @method        CarbonInterface  subRealSeconds(int $value = 1)                                                     Sub seconds (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  subRealSecond()                                                                    Sub one second to the instance (using timestamp).
 * @method        CarbonPeriod     secondsUntil($endDate = null, int $factor = 1)                                     Return an iterable period from current date to given end (string, DateTime or Carbon instance) for each second or every X seconds if a factor is given.
 * @method        CarbonInterface  addRealMinutes(int $value = 1)                                                     Add minutes (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  addRealMinute()                                                                    Add one minute to the instance (using timestamp).
 * @method        CarbonInterface  subRealMinutes(int $value = 1)                                                     Sub minutes (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  subRealMinute()                                                                    Sub one minute to the instance (using timestamp).
 * @method        CarbonPeriod     minutesUntil($endDate = null, int $factor = 1)                                     Return an iterable period from current date to given end (string, DateTime or Carbon instance) for each minute or every X minutes if a factor is given.
 * @method        CarbonInterface  addRealHours(int $value = 1)                                                       Add hours (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  addRealHour()                                                                      Add one hour to the instance (using timestamp).
 * @method        CarbonInterface  subRealHours(int $value = 1)                                                       Sub hours (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  subRealHour()                                                                      Sub one hour to the instance (using timestamp).
 * @method        CarbonPeriod     hoursUntil($endDate = null, int $factor = 1)                                       Return an iterable period from current date to given end (string, DateTime or Carbon instance) for each hour or every X hours if a factor is given.
 * @method        CarbonInterface  addRealDays(int $value = 1)                                                        Add days (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  addRealDay()                                                                       Add one day to the instance (using timestamp).
 * @method        CarbonInterface  subRealDays(int $value = 1)                                                        Sub days (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  subRealDay()                                                                       Sub one day to the instance (using timestamp).
 * @method        CarbonPeriod     daysUntil($endDate = null, int $factor = 1)                                        Return an iterable period from current date to given end (string, DateTime or Carbon instance) for each day or every X days if a factor is given.
 * @method        CarbonInterface  addRealWeeks(int $value = 1)                                                       Add weeks (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  addRealWeek()                                                                      Add one week to the instance (using timestamp).
 * @method        CarbonInterface  subRealWeeks(int $value = 1)                                                       Sub weeks (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  subRealWeek()                                                                      Sub one week to the instance (using timestamp).
 * @method        CarbonPeriod     weeksUntil($endDate = null, int $factor = 1)                                       Return an iterable period from current date to given end (string, DateTime or Carbon instance) for each week or every X weeks if a factor is given.
 * @method        CarbonInterface  addRealMonths(int $value = 1)                                                      Add months (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  addRealMonth()                                                                     Add one month to the instance (using timestamp).
 * @method        CarbonInterface  subRealMonths(int $value = 1)                                                      Sub months (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  subRealMonth()                                                                     Sub one month to the instance (using timestamp).
 * @method        CarbonPeriod     monthsUntil($endDate = null, int $factor = 1)                                      Return an iterable period from current date to given end (string, DateTime or Carbon instance) for each month or every X months if a factor is given.
 * @method        CarbonInterface  addRealQuarters(int $value = 1)                                                    Add quarters (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  addRealQuarter()                                                                   Add one quarter to the instance (using timestamp).
 * @method        CarbonInterface  subRealQuarters(int $value = 1)                                                    Sub quarters (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  subRealQuarter()                                                                   Sub one quarter to the instance (using timestamp).
 * @method        CarbonPeriod     quartersUntil($endDate = null, int $factor = 1)                                    Return an iterable period from current date to given end (string, DateTime or Carbon instance) for each quarter or every X quarters if a factor is given.
 * @method        CarbonInterface  addRealYears(int $value = 1)                                                       Add years (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  addRealYear()                                                                      Add one year to the instance (using timestamp).
 * @method        CarbonInterface  subRealYears(int $value = 1)                                                       Sub years (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  subRealYear()                                                                      Sub one year to the instance (using timestamp).
 * @method        CarbonPeriod     yearsUntil($endDate = null, int $factor = 1)                                       Return an iterable period from current date to given end (string, DateTime or Carbon instance) for each year or every X years if a factor is given.
 * @method        CarbonInterface  addRealDecades(int $value = 1)                                                     Add decades (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  addRealDecade()                                                                    Add one decade to the instance (using timestamp).
 * @method        CarbonInterface  subRealDecades(int $value = 1)                                                     Sub decades (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  subRealDecade()                                                                    Sub one decade to the instance (using timestamp).
 * @method        CarbonPeriod     decadesUntil($endDate = null, int $factor = 1)                                     Return an iterable period from current date to given end (string, DateTime or Carbon instance) for each decade or every X decades if a factor is given.
 * @method        CarbonInterface  addRealCenturies(int $value = 1)                                                   Add centuries (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  addRealCentury()                                                                   Add one century to the instance (using timestamp).
 * @method        CarbonInterface  subRealCenturies(int $value = 1)                                                   Sub centuries (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  subRealCentury()                                                                   Sub one century to the instance (using timestamp).
 * @method        CarbonPeriod     centuriesUntil($endDate = null, int $factor = 1)                                   Return an iterable period from current date to given end (string, DateTime or Carbon instance) for each century or every X centuries if a factor is given.
 * @method        CarbonInterface  addRealMillennia(int $value = 1)                                                   Add millennia (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  addRealMillennium()                                                                Add one millennium to the instance (using timestamp).
 * @method        CarbonInterface  subRealMillennia(int $value = 1)                                                   Sub millennia (the $value count passed in) to the instance (using timestamp).
 * @method        CarbonInterface  subRealMillennium()                                                                Sub one millennium to the instance (using timestamp).
 * @method        CarbonPeriod     millenniaUntil($endDate = null, int $factor = 1)                                   Return an iterable period from current date to given end (string, DateTime or Carbon instance) for each millennium or every X millennia if a factor is given.
 * @method        CarbonInterface  roundYear(float $precision = 1, string $function = "round")                        Round the current instance year with given precision using the given function.
 * @method        CarbonInterface  roundYears(float $precision = 1, string $function = "round")                       Round the current instance year with given precision using the given function.
 * @method        CarbonInterface  floorYear(float $precision = 1)                                                    Truncate the current instance year with given precision.
 * @method        CarbonInterface  floorYears(float $precision = 1)                                                   Truncate the current instance year with given precision.
 * @method        CarbonInterface  ceilYear(float $precision = 1)                                                     Ceil the current instance year with given precision.
 * @method        CarbonInterface  ceilYears(float $precision = 1)                                                    Ceil the current instance year with given precision.
 * @method        CarbonInterface  roundMonth(float $precision = 1, string $function = "round")                       Round the current instance month with given precision using the given function.
 * @method        CarbonInterface  roundMonths(float $precision = 1, string $function = "round")                      Round the current instance month with given precision using the given function.
 * @method        CarbonInterface  floorMonth(float $precision = 1)                                                   Truncate the current instance month with given precision.
 * @method        CarbonInterface  floorMonths(float $precision = 1)                                                  Truncate the current instance month with given precision.
 * @method        CarbonInterface  ceilMonth(float $precision = 1)                                                    Ceil the current instance month with given precision.
 * @method        CarbonInterface  ceilMonths(float $precision = 1)                                                   Ceil the current instance month with given precision.
 * @method        CarbonInterface  roundDay(float $precision = 1, string $function = "round")                         Round the current instance day with given precision using the given function.
 * @method        CarbonInterface  roundDays(float $precision = 1, string $function = "round")                        Round the current instance day with given precision using the given function.
 * @method        CarbonInterface  floorDay(float $precision = 1)                                                     Truncate the current instance day with given precision.
 * @method        CarbonInterface  floorDays(float $precision = 1)                                                    Truncate the current instance day with given precision.
 * @method        CarbonInterface  ceilDay(float $precision = 1)                                                      Ceil the current instance day with given precision.
 * @method        CarbonInterface  ceilDays(float $precision = 1)                                                     Ceil the current instance day with given precision.
 * @method        CarbonInterface  roundHour(float $precision = 1, string $function = "round")                        Round the current instance hour with given precision using the given function.
 * @method        CarbonInterface  roundHours(float $precision = 1, string $function = "round")                       Round the current instance hour with given precision using the given function.
 * @method        CarbonInterface  floorHour(float $precision = 1)                                                    Truncate the current instance hour with given precision.
 * @method        CarbonInterface  floorHours(float $precision = 1)                                                   Truncate the current instance hour with given precision.
 * @method        CarbonInterface  ceilHour(float $precision = 1)                                                     Ceil the current instance hour with given precision.
 * @method        CarbonInterface  ceilHours(float $precision = 1)                                                    Ceil the current instance hour with given precision.
 * @method        CarbonInterface  roundMinute(float $precision = 1, string $function = "round")                      Round the current instance minute with given precision using the given function.
 * @method        CarbonInterface  roundMinutes(float $precision = 1, string $function = "round")                     Round the current instance minute with given precision using the given function.
 * @method        CarbonInterface  floorMinute(float $precision = 1)                                                  Truncate the current instance minute with given precision.
 * @method        CarbonInterface  floorMinutes(float $precision = 1)                                                 Truncate the current instance minute with given precision.
 * @method        CarbonInterface  ceilMinute(float $precision = 1)                                                   Ceil the current instance minute with given precision.
 * @method        CarbonInterface  ceilMinutes(float $precision = 1)                                                  Ceil the current instance minute with given precision.
 * @method        CarbonInterface  roundSecond(float $precision = 1, string $function = "round")                      Round the current instance second with given precision using the given function.
 * @method        CarbonInterface  roundSeconds(float $precision = 1, string $function = "round")                     Round the current instance second with given precision using the given function.
 * @method        CarbonInterface  floorSecond(float $precision = 1)                                                  Truncate the current instance second with given precision.
 * @method        CarbonInterface  floorSeconds(float $precision = 1)                                                 Truncate the current instance second with given precision.
 * @method        CarbonInterface  ceilSecond(float $precision = 1)                                                   Ceil the current instance second with given precision.
 * @method        CarbonInterface  ceilSeconds(float $precision = 1)                                                  Ceil the current instance second with given precision.
 * @method        CarbonInterface  roundMillennium(float $precision = 1, string $function = "round")                  Round the current instance millennium with given precision using the given function.
 * @method        CarbonInterface  roundMillennia(float $precision = 1, string $function = "round")                   Round the current instance millennium with given precision using the given function.
 * @method        CarbonInterface  floorMillennium(float $precision = 1)                                              Truncate the current instance millennium with given precision.
 * @method        CarbonInterface  floorMillennia(float $precision = 1)                                               Truncate the current instance millennium with given precision.
 * @method        CarbonInterface  ceilMillennium(float $precision = 1)                                               Ceil the current instance millennium with given precision.
 * @method        CarbonInterface  ceilMillennia(float $precision = 1)                                                Ceil the current instance millennium with given precision.
 * @method        CarbonInterface  roundCentury(float $precision = 1, string $function = "round")                     Round the current instance century with given precision using the given function.
 * @method        CarbonInterface  roundCenturies(float $precision = 1, string $function = "round")                   Round the current instance century with given precision using the given function.
 * @method        CarbonInterface  floorCentury(float $precision = 1)                                                 Truncate the current instance century with given precision.
 * @method        CarbonInterface  floorCenturies(float $precision = 1)                                               Truncate the current instance century with given precision.
 * @method        CarbonInterface  ceilCentury(float $precision = 1)                                                  Ceil the current instance century with given precision.
 * @method        CarbonInterface  ceilCenturies(float $precision = 1)                                                Ceil the current instance century with given precision.
 * @method        CarbonInterface  roundDecade(float $precision = 1, string $function = "round")                      Round the current instance decade with given precision using the given function.
 * @method        CarbonInterface  roundDecades(float $precision = 1, string $function = "round")                     Round the current instance decade with given precision using the given function.
 * @method        CarbonInterface  floorDecade(float $precision = 1)                                                  Truncate the current instance decade with given precision.
 * @method        CarbonInterface  floorDecades(float $precision = 1)                                                 Truncate the current instance decade with given precision.
 * @method        CarbonInterface  ceilDecade(float $precision = 1)                                                   Ceil the current instance decade with given precision.
 * @method        CarbonInterface  ceilDecades(float $precision = 1)                                                  Ceil the current instance decade with given precision.
 * @method        CarbonInterface  roundQuarter(float $precision = 1, string $function = "round")                     Round the current instance quarter with given precision using the given function.
 * @method        CarbonInterface  roundQuarters(float $precision = 1, string $function = "round")                    Round the current instance quarter with given precision using the given function.
 * @method        CarbonInterface  floorQuarter(float $precision = 1)                                                 Truncate the current instance quarter with given precision.
 * @method        CarbonInterface  floorQuarters(float $precision = 1)                                                Truncate the current instance quarter with given precision.
 * @method        CarbonInterface  ceilQuarter(float $precision = 1)                                                  Ceil the current instance quarter with given precision.
 * @method        CarbonInterface  ceilQuarters(float $precision = 1)                                                 Ceil the current instance quarter with given precision.
 * @method        CarbonInterface  roundMillisecond(float $precision = 1, string $function = "round")                 Round the current instance millisecond with given precision using the given function.
 * @method        CarbonInterface  roundMilliseconds(float $precision = 1, string $function = "round")                Round the current instance millisecond with given precision using the given function.
 * @method        CarbonInterface  floorMillisecond(float $precision = 1)                                             Truncate the current instance millisecond with given precision.
 * @method        CarbonInterface  floorMilliseconds(float $precision = 1)                                            Truncate the current instance millisecond with given precision.
 * @method        CarbonInterface  ceilMillisecond(float $precision = 1)                                              Ceil the current instance millisecond with given precision.
 * @method        CarbonInterface  ceilMilliseconds(float $precision = 1)                                             Ceil the current instance millisecond with given precision.
 * @method        CarbonInterface  roundMicrosecond(float $precision = 1, string $function = "round")                 Round the current instance microsecond with given precision using the given function.
 * @method        CarbonInterface  roundMicroseconds(float $precision = 1, string $function = "round")                Round the current instance microsecond with given precision using the given function.
 * @method        CarbonInterface  floorMicrosecond(float $precision = 1)                                             Truncate the current instance microsecond with given precision.
 * @method        CarbonInterface  floorMicroseconds(float $precision = 1)                                            Truncate the current instance microsecond with given precision.
 * @method        CarbonInterface  ceilMicrosecond(float $precision = 1)                                              Ceil the current instance microsecond with given precision.
 * @method        CarbonInterface  ceilMicroseconds(float $precision = 1)                                             Ceil the current instance microsecond with given precision.
 * @method        string           shortAbsoluteDiffForHumans(DateTimeInterface $other = null, int $parts = 1)        Get the difference (short format, 'Absolute' mode) in a human readable format in the current locale. ($other and $parts parameters can be swapped.)
 * @method        string           longAbsoluteDiffForHumans(DateTimeInterface $other = null, int $parts = 1)         Get the difference (long format, 'Absolute' mode) in a human readable format in the current locale. ($other and $parts parameters can be swapped.)
 * @method        string           shortRelativeDiffForHumans(DateTimeInterface $other = null, int $parts = 1)        Get the difference (short format, 'Relative' mode) in a human readable format in the current locale. ($other and $parts parameters can be swapped.)
 * @method        string           longRelativeDiffForHumans(DateTimeInterface $other = null, int $parts = 1)         Get the difference (long format, 'Relative' mode) in a human readable format in the current locale. ($other and $parts parameters can be swapped.)
 * @method        string           shortRelativeToNowDiffForHumans(DateTimeInterface $other = null, int $parts = 1)   Get the difference (short format, 'RelativeToNow' mode) in a human readable format in the current locale. ($other and $parts parameters can be swapped.)
 * @method        string           longRelativeToNowDiffForHumans(DateTimeInterface $other = null, int $parts = 1)    Get the difference (long format, 'RelativeToNow' mode) in a human readable format in the current locale. ($other and $parts parameters can be swapped.)
 * @method        string           shortRelativeToOtherDiffForHumans(DateTimeInterface $other = null, int $parts = 1) Get the difference (short format, 'RelativeToOther' mode) in a human readable format in the current locale. ($other and $parts parameters can be swapped.)
 * @method        string           longRelativeToOtherDiffForHumans(DateTimeInterface $other = null, int $parts = 1)  Get the difference (long format, 'RelativeToOther' mode) in a human readable format in the current locale. ($other and $parts parameters can be swapped.)
 *
 * </autodoc>
 */
interface CarbonInterface extends DateTimeInterface, JsonSerializable
{
    /**
     * Diff wording options(expressed in octal).
     */
    public const NO_ZERO_DIFF = 01;
    public const JUST_NOW = 02;
    public const ONE_DAY_WORDS = 04;
    public const TWO_DAY_WORDS = 010;
    public const SEQUENTIAL_PARTS_ONLY = 020;
    public const ROUND = 040;
    public const FLOOR = 0100;
    public const CEIL = 0200;

/**
     * Diff syntax options.
     */
    public const DIFF_ABSOLUTE = 1; // backward compatibility with true
    public const DIFF_RELATIVE_AUTO = 0; // backward compatibility with false
    public const DIFF_RELATIVE_TO_NOW = 2;
    public const DIFF_RELATIVE_TO_OTHER = 3;

/**
     * Translate string options.
     */
    public const TRANSLATE_MONTHS = 1;
    public const TRANSLATE_DAYS = 2;
    public const TRANSLATE_UNITS = 4;
    public const TRANSLATE_MERIDIEM = 8;
    public const TRANSLATE_DIFF = 0x10;
    public const TRANSLATE_ALL = self::TRANSLATE_MONTHS | self::TRANSLATE_DAYS | self::TRANSLATE_UNITS | self::TRANSLATE_MERIDIEM | self::TRANSLATE_DIFF;

/**
     * The day constants.
     */
    public const SUNDAY = 0;
    public const MONDAY = 1;
    public const TUESDAY = 2;
    public const WEDNESDAY = 3;
    public const THURSDAY = 4;
    public const FRIDAY = 5;
    public const SATURDAY = 6;

/**
     * The month constants.
     * These aren't used by Carbon itself but exist for
     * convenience sake alone.
     */
    public const JANUARY = 1;
    public const FEBRUARY = 2;
    public const MARCH = 3;
    public const APRIL = 4;
    public const MAY = 5;
    public const JUNE = 6;
    public const JULY = 7;
    public const AUGUST = 8;
    public const SEPTEMBER = 9;
    public const OCTOBER = 10;
    public const NOVEMBER = 11;
    public const DECEMBER = 12;

/**
     * Number of X in Y.
     */
    public const YEARS_PER_MILLENNIUM = 1000;
    public const YEARS_PER_CENTURY = 100;
    public const YEARS_PER_DECADE = 10;
    public const MONTHS_PER_YEAR = 12;
    public const MONTHS_PER_QUARTER = 3;
    public const WEEKS_PER_YEAR = 52;
    public const WEEKS_PER_MONTH = 4;
    public const DAYS_PER_YEAR = 365;
    public const DAYS_PER_WEEK = 7;
    public const HOURS_PER_DAY = 24;
    public const MINUTES_PER_HOUR = 60;
    public const SECONDS_PER_MINUTE = 60;
    public const MILLISECONDS_PER_SECOND = 1000;
    public const MICROSECONDS_PER_MILLISECOND = 1000;
    public const MICROSECONDS_PER_SECOND = 1000000;

/**
     * Special settings to get the start of week from current locale culture.
     */
    public const WEEK_DAY_AUTO = 'auto';

/**
     * RFC7231 DateTime format.
     *
     * @var string
     */
    public const RFC7231_FORMAT = 'D, d M Y H:i:s \G\M\T';

/**
     * Default format to use for __toString method when type juggling occurs.
     *
     * @var string
     */
    public const DEFAULT_TO_STRING_FORMAT = 'Y-m-d H:i:s';

/**
     * Format for converting mocked time, includes microseconds.
     *
     * @var string
     */
    public const MOCK_DATETIME_FORMAT = 'Y-m-d H:i:s.u';

/**
     * Pattern detection for ->isoFormat and ::createFromIsoFormat.
     *
     * @var string
     */
    public const ISO_FORMAT_REGEXP = '(O[YMDHhms]|[Hh]mm(ss)?|Mo|MM?M?M?|Do|DDDo|DD?D?D?|ddd?d?|do?|w[o|w]?|W[o|W]?|Qo?|YYYYYY|YYYYY|YYYY|YY?|g{1,5}|G{1,5}|e|E|a|A|hh?|HH?|kk?|mm?|ss?|S{1,9}|x|X|zz?|ZZ?)';

// <methods>

/**
     * Dynamically handle calls to the class.
     *
     * @param string $method     magic method name called
     * @param array  $parameters parameters list
     *
     * @throws UnknownMethodException|BadMethodCallException|ReflectionException|Throwable
     *
     * @return mixed
     */
    public function __call($method, $parameters);

/**
     * Dynamically handle calls to the class.
     *
     * @param string $method     magic method name called
     * @param array  $parameters parameters list
     *
     * @throws BadMethodCallException
     *
     * @return mixed
     */
    public static function __callStatic($method, $parameters);

/**
     * Update constructedObjectId on cloned.
     */
    public function __clone();

/**
     * Create a new Carbon instance.
     *
     * Please see the testing aids section (specifically static::setTestNow())
     * for more on the possibility of this constructor returning a test instance.
     *
     * @param string|null              $time
     * @param DateTimeZone|string|null $tz
     *
     * @throws InvalidFormatException
     */
    public function __construct($time = null, $tz = null);

/**
     * Show truthy properties on var_dump().
     *
     * @return array
     */
    public function __debugInfo();

/**
     * Get a part of the Carbon object
     *
     * @param string $name
     *
     * @throws UnknownGetterException
     *
     * @return string|int|bool|DateTimeZone|null
     */
    public function __get($name);

/**
     * Check if an attribute exists on the object
     *
     * @param string $name
     *
     * @return bool
     */
    public function __isset($name);

/**
     * Set a part of the Carbon object
     *
     * @param string                  $name
     * @param string|int|DateTimeZone $value
     *
     * @throws UnknownSetterException|ReflectionException
     *
     * @return void
     */
    public function __set($name, $value);

/**
     * The __set_state handler.
     *
     * @param string|array $dump
     *
     * @return static
     */
    public static function __set_state($dump);

/**
     * Returns the list of properties to dump on serialize() called on.
     *
     * @return array
     */
    public function __sleep();

/**
     * Format the instance as a string using the set format
     *
     * @example
     * ```
     * echo Carbon::now(); // Carbon instances can be casted to string
     * ```
     *
     * @return string
     */
    public function __toString();

/**
     * Add given units or interval to the current instance.
     *
     * @example $date->add('hour', 3)
     * @example $date->add(15, 'days')
     * @example $date->add(CarbonInterval::days(4))
     *
     * @param string|DateInterval|Closure|CarbonConverterInterface $unit
     * @param int                                                  $value
     * @param bool|null                                            $overflow
     *
     * @return static
     */
    public function add($unit, $value = 1, $overflow = null);

/**
     * Add seconds to the instance using timestamp. Positive $value travels
     * forward while negative $value travels into the past.
     *
     * @param string $unit
     * @param int    $value
     *
     * @return static
     */
    public function addRealUnit($unit, $value = 1);

/**
     * Add given units to the current instance.
     *
     * @param string    $unit
     * @param int       $value
     * @param bool|null $overflow
     *
     * @return static
     */
    public function addUnit($unit, $value = 1, $overflow = null);

/**
     * Add any unit to a new value without overflowing current other unit given.
     *
     * @param string $valueUnit    unit name to modify
     * @param int    $value        amount to add to the input unit
     * @param string $overflowUnit unit name to not overflow
     *
     * @return static
     */
    public function addUnitNoOverflow($valueUnit, $value, $overflowUnit);

/**
     * Get the difference in a human readable format in the current locale from an other
     * instance given to now
     *
     * @param int|array $syntax  if array passed, parameters will be extracted from it, the array may contains:
     *                           - 'syntax' entry (see below)
     *                           - 'short' entry (see below)
     *                           - 'parts' entry (see below)
     *                           - 'options' entry (see below)
     *                           - 'join' entry determines how to join multiple parts of the string
     *                           `  - if $join is a string, it's used as a joiner glue
     *                           `  - if $join is a callable/closure, it get the list of string and should return a string
     *                           `  - if $join is an array, the first item will be the default glue, and the second item
     *                           `    will be used instead of the glue for the last item
     *                           `  - if $join is true, it will be guessed from the locale ('list' translation file entry)
     *                           `  - if $join is missing, a space will be used as glue
     *                           if int passed, it add modifiers:
     *                           Possible values:
     *                           - CarbonInterface::DIFF_ABSOLUTE          no modifiers
     *                           - CarbonInterface::DIFF_RELATIVE_TO_NOW   add ago/from now modifier
     *                           - CarbonInterface::DIFF_RELATIVE_TO_OTHER add before/after modifier
     *                           Default value: CarbonInterface::DIFF_ABSOLUTE
     * @param bool      $short   displays short format of time units
     * @param int       $parts   maximum number of parts to display (default value: 1: single part)
     * @param int       $options human diff options
     *
     * @return string
     */
    public function ago($syntax = null, $short = false, $parts = 1, $options = null);

/**
     * Modify the current instance to the average of a given instance (default now) and the current instance
     * (second-precision).
     *
     * @param \Carbon\Carbon|\DateTimeInterface|null $date
     *
     * @return static
     */
    public function average($date = null);

/**
     * Determines if the instance is between two others.
     *
     * The third argument allow you to specify if bounds are included or not (true by default)
     * but for when you including/excluding bounds may produce different results in your application,
     * we recommend to use the explicit methods ->betweenIncluded() or ->betweenExcluded() instead.
     *
     * @example
     * ```
     * Carbon::parse('2018-07-25')->between('2018-07-14', '2018-08-01'); // true
     * Carbon::parse('2018-07-25')->between('2018-08-01', '2018-08-20'); // false
     * Carbon::parse('2018-07-25')->between('2018-07-25', '2018-08-01'); // true
     * Carbon::parse('2018-07-25')->between('2018-07-25', '2018-08-01', false); // false
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date1
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date2
     * @param bool                                    $equal Indicates if an equal to comparison should be done
     *
     * @return bool
     */
    public function between($date1, $date2, $equal = true): bool;

/**
     * Determines if the instance is between two others, bounds excluded.
     *
     * @example
     * ```
     * Carbon::parse('2018-07-25')->betweenExcluded('2018-07-14', '2018-08-01'); // true
     * Carbon::parse('2018-07-25')->betweenExcluded('2018-08-01', '2018-08-20'); // false
     * Carbon::parse('2018-07-25')->betweenExcluded('2018-07-25', '2018-08-01'); // false
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date1
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date2
     *
     * @return bool
     */
    public function betweenExcluded($date1, $date2): bool;

/**
     * Determines if the instance is between two others, bounds included.
     *
     * @example
     * ```
     * Carbon::parse('2018-07-25')->betweenIncluded('2018-07-14', '2018-08-01'); // true
     * Carbon::parse('2018-07-25')->betweenIncluded('2018-08-01', '2018-08-20'); // false
     * Carbon::parse('2018-07-25')->betweenIncluded('2018-07-25', '2018-08-01'); // true
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date1
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date2
     *
     * @return bool
     */
    public function betweenIncluded($date1, $date2): bool;

/**
     * Returns either day of week + time (e.g. "Last Friday at 3:30 PM") if reference time is within 7 days,
     * or a calendar date (e.g. "10/29/2017") otherwise.
     *
     * Language, date and time formats will change according to the current locale.
     *
     * @param Carbon|\DateTimeInterface|string|null $referenceTime
     * @param array                                 $formats
     *
     * @return string
     */
    public function calendar($referenceTime = null, array $formats = []);

/**
     * Checks if the (date)time string is in a given format and valid to create a
     * new instance.
     *
     * @example
     * ```
     * Carbon::canBeCreatedFromFormat('11:12:45', 'h:i:s'); // true
     * Carbon::canBeCreatedFromFormat('13:12:45', 'h:i:s'); // false
     * ```
     *
     * @param string $date
     * @param string $format
     *
     * @return bool
     */
    public static function canBeCreatedFromFormat($date, $format);

/**
     * Return the Carbon instance passed through, a now instance in the same timezone
     * if null given or parse the input if string given.
     *
     * @param Carbon|\Carbon\CarbonPeriod|\Carbon\CarbonInterval|\DateInterval|\DatePeriod|DateTimeInterface|string|null $date
     *
     * @return static
     */
    public function carbonize($date = null);

/**
     * Cast the current instance into the given class.
     *
     * @param string $className The $className::instance() method will be called to cast the current object.
     *
     * @return DateTimeInterface
     */
    public function cast(string $className);

/**
     * Ceil the current instance second with given precision if specified.
     *
     * @param float|int|string|\DateInterval|null $precision
     *
     * @return CarbonInterface
     */
    public function ceil($precision = 1);

/**
     * Ceil the current instance at the given unit with given precision if specified.
     *
     * @param string    $unit
     * @param float|int $precision
     *
     * @return CarbonInterface
     */
    public function ceilUnit($unit, $precision = 1);

/**
     * Ceil the current instance week.
     *
     * @param int $weekStartsAt optional start allow you to specify the day of week to use to start the week
     *
     * @return CarbonInterface
     */
    public function ceilWeek($weekStartsAt = null);

/**
     * Similar to native modify() method of DateTime but can handle more grammars.
     *
     * @example
     * ```
     * echo Carbon::now()->change('next 2pm');
     * ```
     *
     * @link https://php.net/manual/en/datetime.modify.php
     *
     * @param string $modifier
     *
     * @return static
     */
    public function change($modifier);

/**
     * Cleanup properties attached to the public scope of DateTime when a dump of the date is requested.
     * foreach ($date as $_) {}
     * serializer($date)
     * var_export($date)
     * get_object_vars($date)
     */
    public function cleanupDumpProperties();

/**
     * @alias copy
     *
     * Get a copy of the instance.
     *
     * @return static
     */
    public function clone();

/**
     * Get the closest date from the instance (second-precision).
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date1
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date2
     *
     * @return static
     */
    public function closest($date1, $date2);

/**
     * Get a copy of the instance.
     *
     * @return static
     */
    public function copy();

/**
     * Create a new Carbon instance from a specific date and time.
     *
     * If any of $year, $month or $day are set to null their now() values will
     * be used.
     *
     * If $hour is null it will be set to its now() value and the default
     * values for $minute and $second will be their now() values.
     *
     * If $hour is not null then the default values for $minute and $second
     * will be 0.
     *
     * @param int|null                 $year
     * @param int|null                 $month
     * @param int|null                 $day
     * @param int|null                 $hour
     * @param int|null                 $minute
     * @param int|null                 $second
     * @param DateTimeZone|string|null $tz
     *
     * @throws InvalidFormatException
     *
     * @return static|false
     */
    public static function create($year = 0, $month = 1, $day = 1, $hour = 0, $minute = 0, $second = 0, $tz = null);

/**
     * Create a Carbon instance from just a date. The time portion is set to now.
     *
     * @param int|null                 $year
     * @param int|null                 $month
     * @param int|null                 $day
     * @param DateTimeZone|string|null $tz
     *
     * @throws InvalidFormatException
     *
     * @return static
     */
    public static function createFromDate($year = null, $month = null, $day = null, $tz = null);

/**
     * Create a Carbon instance from a specific format.
     *
     * @param string                         $format Datetime format
     * @param string                         $time
     * @param DateTimeZone|string|false|null $tz
     *
     * @throws InvalidFormatException
     *
     * @return static|false
     */
    public static function createFromFormat($format, $time, $tz = null);

/**
     * Create a Carbon instance from a specific ISO format (same replacements as ->isoFormat()).
     *
     * @param string                                             $format     Datetime format
     * @param string                                             $time
     * @param DateTimeZone|string|false|null                     $tz         optional timezone
     * @param string|null                                        $locale     locale to be used for LTS, LT, LL, LLL, etc. macro-formats (en by fault, unneeded if no such macro-format in use)
     * @param \Symfony\Component\Translation\TranslatorInterface $translator optional custom translator to use for macro-formats
     *
     * @throws InvalidFormatException
     *
     * @return static|false
     */
    public static function createFromIsoFormat($format, $time, $tz = null, $locale = 'en', $translator = null);

/**
     * Create a Carbon instance from a specific format and a string in a given language.
     *
     * @param string                         $format Datetime format
     * @param string                         $locale
     * @param string                         $time
     * @param DateTimeZone|string|false|null $tz
     *
     * @throws InvalidFormatException
     *
     * @return static|false
     */
    public static function createFromLocaleFormat($format, $locale, $time, $tz = null);

/**
     * Create a Carbon instance from a specific ISO format and a string in a given language.
     *
     * @param string                         $format Datetime ISO format
     * @param string                         $locale
     * @param string                         $time
     * @param DateTimeZone|string|false|null $tz
     *
     * @throws InvalidFormatException
     *
     * @return static|false
     */
    public static function createFromLocaleIsoFormat($format, $locale, $time, $tz = null);

/**
     * Create a Carbon instance from just a time. The date portion is set to today.
     *
     * @param int|null                 $hour
     * @param int|null                 $minute
     * @param int|null                 $second
     * @param DateTimeZone|string|null $tz
     *
     * @throws InvalidFormatException
     *
     * @return static
     */
    public static function createFromTime($hour = 0, $minute = 0, $second = 0, $tz = null);

/**
     * Create a Carbon instance from a time string. The date portion is set to today.
     *
     * @param string                   $time
     * @param DateTimeZone|string|null $tz
     *
     * @throws InvalidFormatException
     *
     * @return static
     */
    public static function createFromTimeString($time, $tz = null);

/**
     * Create a Carbon instance from a timestamp and set the timezone (use default one if not specified).
     *
     * Timestamp input can be given as int, float or a string containing one or more numbers.
     *
     * @param float|int|string          $timestamp
     * @param \DateTimeZone|string|null $tz
     *
     * @return static
     */
    public static function createFromTimestamp($timestamp, $tz = null);

/**
     * Create a Carbon instance from a timestamp in milliseconds.
     *
     * Timestamp input can be given as int, float or a string containing one or more numbers.
     *
     * @param float|int|string          $timestamp
     * @param \DateTimeZone|string|null $tz
     *
     * @return static
     */
    public static function createFromTimestampMs($timestamp, $tz = null);

/**
     * Create a Carbon instance from a timestamp in milliseconds.
     *
     * Timestamp input can be given as int, float or a string containing one or more numbers.
     *
     * @param float|int|string $timestamp
     *
     * @return static
     */
    public static function createFromTimestampMsUTC($timestamp);

/**
     * Create a Carbon instance from an timestamp keeping the timezone to UTC.
     *
     * Timestamp input can be given as int, float or a string containing one or more numbers.
     *
     * @param float|int|string $timestamp
     *
     * @return static
     */
    public static function createFromTimestampUTC($timestamp);

/**
     * Create a Carbon instance from just a date. The time portion is set to midnight.
     *
     * @param int|null                 $year
     * @param int|null                 $month
     * @param int|null                 $day
     * @param DateTimeZone|string|null $tz
     *
     * @throws InvalidFormatException
     *
     * @return static
     */
    public static function createMidnightDate($year = null, $month = null, $day = null, $tz = null);

/**
     * Create a new safe Carbon instance from a specific date and time.
     *
     * If any of $year, $month or $day are set to null their now() values will
     * be used.
     *
     * If $hour is null it will be set to its now() value and the default
     * values for $minute and $second will be their now() values.
     *
     * If $hour is not null then the default values for $minute and $second
     * will be 0.
     *
     * If one of the set values is not valid, an InvalidDateException
     * will be thrown.
     *
     * @param int|null                 $year
     * @param int|null                 $month
     * @param int|null                 $day
     * @param int|null                 $hour
     * @param int|null                 $minute
     * @param int|null                 $second
     * @param DateTimeZone|string|null $tz
     *
     * @throws InvalidDateException
     *
     * @return static|false
     */
    public static function createSafe($year = null, $month = null, $day = null, $hour = null, $minute = null, $second = null, $tz = null);

/**
     * Get/set the day of year.
     *
     * @param int|null $value new value for day of year if using as setter.
     *
     * @return static|int
     */
    public function dayOfYear($value = null);

/**
     * Get the difference as a CarbonInterval instance.
     * Return absolute interval (always positive) unless you pass false to the second argument.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return CarbonInterval
     */
    public function diffAsCarbonInterval($date = null, $absolute = true);

/**
     * Get the difference by the given interval using a filter closure.
     *
     * @param CarbonInterval                                         $ci       An interval to traverse by
     * @param Closure                                                $callback
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffFiltered(CarbonInterval $ci, Closure $callback, $date = null, $absolute = true);

/**
     * Get the difference in a human readable format in the current locale from current instance to an other
     * instance given (or now if null given).
     *
     * @example
     * ```
     * echo Carbon::tomorrow()->diffForHumans() . "\n";
     * echo Carbon::tomorrow()->diffForHumans(['parts' => 2]) . "\n";
     * echo Carbon::tomorrow()->diffForHumans(['parts' => 3, 'join' => true]) . "\n";
     * echo Carbon::tomorrow()->diffForHumans(Carbon::yesterday()) . "\n";
     * echo Carbon::tomorrow()->diffForHumans(Carbon::yesterday(), ['short' => true]) . "\n";
     * ```
     *
     * @param Carbon|\DateTimeInterface|string|array|null $other   if array passed, will be used as parameters array, see $syntax below;
     *                                                             if null passed, now will be used as comparison reference;
     *                                                             if any other type, it will be converted to date and used as reference.
     * @param int|array                                   $syntax  if array passed, parameters will be extracted from it, the array may contains:
     *                                                             - 'syntax' entry (see below)
     *                                                             - 'short' entry (see below)
     *                                                             - 'parts' entry (see below)
     *                                                             - 'options' entry (see below)
     *                                                             - 'join' entry determines how to join multiple parts of the string
     *                                                             `  - if $join is a string, it's used as a joiner glue
     *                                                             `  - if $join is a callable/closure, it get the list of string and should return a string
     *                                                             `  - if $join is an array, the first item will be the default glue, and the second item
     *                                                             `    will be used instead of the glue for the last item
     *                                                             `  - if $join is true, it will be guessed from the locale ('list' translation file entry)
     *                                                             `  - if $join is missing, a space will be used as glue
     *                                                             - 'other' entry (see above)
     *                                                             if int passed, it add modifiers:
     *                                                             Possible values:
     *                                                             - CarbonInterface::DIFF_ABSOLUTE          no modifiers
     *                                                             - CarbonInterface::DIFF_RELATIVE_TO_NOW   add ago/from now modifier
     *                                                             - CarbonInterface::DIFF_RELATIVE_TO_OTHER add before/after modifier
     *                                                             Default value: CarbonInterface::DIFF_ABSOLUTE
     * @param bool                                        $short   displays short format of time units
     * @param int                                         $parts   maximum number of parts to display (default value: 1: single unit)
     * @param int                                         $options human diff options
     *
     * @return string
     */
    public function diffForHumans($other = null, $syntax = null, $short = false, $parts = 1, $options = null);

/**
     * Get the difference in days rounded down.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInDays($date = null, $absolute = true);

/**
     * Get the difference in days using a filter closure rounded down.
     *
     * @param Closure                                                $callback
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInDaysFiltered(Closure $callback, $date = null, $absolute = true);

/**
     * Get the difference in hours rounded down.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInHours($date = null, $absolute = true);

/**
     * Get the difference in hours using a filter closure rounded down.
     *
     * @param Closure                                                $callback
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInHoursFiltered(Closure $callback, $date = null, $absolute = true);

/**
     * Get the difference in microseconds.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInMicroseconds($date = null, $absolute = true);

/**
     * Get the difference in milliseconds rounded down.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInMilliseconds($date = null, $absolute = true);

/**
     * Get the difference in minutes rounded down.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInMinutes($date = null, $absolute = true);

/**
     * Get the difference in months rounded down.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInMonths($date = null, $absolute = true);

/**
     * Get the difference in quarters rounded down.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInQuarters($date = null, $absolute = true);

/**
     * Get the difference in hours rounded down using timestamps.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInRealHours($date = null, $absolute = true);

/**
     * Get the difference in microseconds using timestamps.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInRealMicroseconds($date = null, $absolute = true);

/**
     * Get the difference in milliseconds rounded down using timestamps.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInRealMilliseconds($date = null, $absolute = true);

/**
     * Get the difference in minutes rounded down using timestamps.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInRealMinutes($date = null, $absolute = true);

/**
     * Get the difference in seconds using timestamps.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInRealSeconds($date = null, $absolute = true);

/**
     * Get the difference in seconds rounded down.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInSeconds($date = null, $absolute = true);

/**
     * Get the difference in weekdays rounded down.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInWeekdays($date = null, $absolute = true);

/**
     * Get the difference in weekend days using a filter rounded down.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInWeekendDays($date = null, $absolute = true);

/**
     * Get the difference in weeks rounded down.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInWeeks($date = null, $absolute = true);

/**
     * Get the difference in years
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return int
     */
    public function diffInYears($date = null, $absolute = true);

/**
     * @deprecated To avoid conflict between different third-party libraries, static setters should not be used.
     *             You should rather use the ->settings() method.
     * @see settings
     *
     * @param int $humanDiffOption
     */
    public static function disableHumanDiffOption($humanDiffOption);

/**
     * Modify to end of current given unit.
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16.334455')
     *   ->startOf('month')
     *   ->endOf('week', Carbon::FRIDAY);
     * ```
     *
     * @param string            $unit
     * @param array<int, mixed> $params
     *
     * @return static
     */
    public function endOf($unit, ...$params);

/**
     * Resets the date to end of the century and time to 23:59:59.999999
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->endOfCentury();
     * ```
     *
     * @return static
     */
    public function endOfCentury();

/**
     * Resets the time to 23:59:59.999999 end of day
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->endOfDay();
     * ```
     *
     * @return static
     */
    public function endOfDay();

/**
     * Resets the date to end of the decade and time to 23:59:59.999999
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->endOfDecade();
     * ```
     *
     * @return static
     */
    public function endOfDecade();

/**
     * Modify to end of current hour, minutes and seconds become 59
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->endOfHour();
     * ```
     *
     * @return static
     */
    public function endOfHour();

/**
     * Resets the date to end of the millennium and time to 23:59:59.999999
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->endOfMillennium();
     * ```
     *
     * @return static
     */
    public function endOfMillennium();

/**
     * Modify to end of current minute, seconds become 59
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->endOfMinute();
     * ```
     *
     * @return static
     */
    public function endOfMinute();

/**
     * Resets the date to end of the month and time to 23:59:59.999999
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->endOfMonth();
     * ```
     *
     * @return static
     */
    public function endOfMonth();

/**
     * Resets the date to end of the quarter and time to 23:59:59.999999
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->endOfQuarter();
     * ```
     *
     * @return static
     */
    public function endOfQuarter();

/**
     * Modify to end of current second, microseconds become 999999
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16.334455')
     *   ->endOfSecond()
     *   ->format('H:i:s.u');
     * ```
     *
     * @return static
     */
    public function endOfSecond();

/**
     * Resets the date to end of week (defined in $weekEndsAt) and time to 23:59:59.999999
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->endOfWeek() . "\n";
     * echo Carbon::parse('2018-07-25 12:45:16')->locale('ar')->endOfWeek() . "\n";
     * echo Carbon::parse('2018-07-25 12:45:16')->endOfWeek(Carbon::SATURDAY) . "\n";
     * ```
     *
     * @param int $weekEndsAt optional start allow you to specify the day of week to use to end the week
     *
     * @return static
     */
    public function endOfWeek($weekEndsAt = null);

/**
     * Resets the date to end of the year and time to 23:59:59.999999
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->endOfYear();
     * ```
     *
     * @return static
     */
    public function endOfYear();

/**
     * Determines if the instance is equal to another
     *
     * @example
     * ```
     * Carbon::parse('2018-07-25 12:45:16')->eq('2018-07-25 12:45:16'); // true
     * Carbon::parse('2018-07-25 12:45:16')->eq(Carbon::parse('2018-07-25 12:45:16')); // true
     * Carbon::parse('2018-07-25 12:45:16')->eq('2018-07-25 12:45:17'); // false
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
     *
     * @see equalTo()
     *
     * @return bool
     */
    public function eq($date): bool;

/**
     * Determines if the instance is equal to another
     *
     * @example
     * ```
     * Carbon::parse('2018-07-25 12:45:16')->equalTo('2018-07-25 12:45:16'); // true
     * Carbon::parse('2018-07-25 12:45:16')->equalTo(Carbon::parse('2018-07-25 12:45:16')); // true
     * Carbon::parse('2018-07-25 12:45:16')->equalTo('2018-07-25 12:45:17'); // false
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
     *
     * @return bool
     */
    public function equalTo($date): bool;

/**
     * Set the current locale to the given, execute the passed function, reset the locale to previous one,
     * then return the result of the closure (or null if the closure was void).
     *
     * @param string   $locale locale ex. en
     * @param callable $func
     *
     * @return mixed
     */
    public static function executeWithLocale($locale, $func);

/**
     * Get the farthest date from the instance (second-precision).
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date1
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date2
     *
     * @return static
     */
    public function farthest($date1, $date2);

/**
     * Modify to the first occurrence of a given day of the week
     * in the current month. If no dayOfWeek is provided, modify to the
     * first day of the current month.  Use the supplied constants
     * to indicate the desired dayOfWeek, ex. static::MONDAY.
     *
     * @param int|null $dayOfWeek
     *
     * @return static
     */
    public function firstOfMonth($dayOfWeek = null);

/**
     * Modify to the first occurrence of a given day of the week
     * in the current quarter. If no dayOfWeek is provided, modify to the
     * first day of the current quarter.  Use the supplied constants
     * to indicate the desired dayOfWeek, ex. static::MONDAY.
     *
     * @param int|null $dayOfWeek day of the week default null
     *
     * @return static
     */
    public function firstOfQuarter($dayOfWeek = null);

/**
     * Modify to the first occurrence of a given day of the week
     * in the current year. If no dayOfWeek is provided, modify to the
     * first day of the current year.  Use the supplied constants
     * to indicate the desired dayOfWeek, ex. static::MONDAY.
     *
     * @param int|null $dayOfWeek day of the week default null
     *
     * @return static
     */
    public function firstOfYear($dayOfWeek = null);

/**
     * Get the difference in days as float (microsecond-precision).
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return float
     */
    public function floatDiffInDays($date = null, $absolute = true);

/**
     * Get the difference in hours as float (microsecond-precision).
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return float
     */
    public function floatDiffInHours($date = null, $absolute = true);

/**
     * Get the difference in minutes as float (microsecond-precision).
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return float
     */
    public function floatDiffInMinutes($date = null, $absolute = true);

/**
     * Get the difference in months as float (microsecond-precision).
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return float
     */
    public function floatDiffInMonths($date = null, $absolute = true);

/**
     * Get the difference in hours as float (microsecond-precision) using timestamps.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return float
     */
    public function floatDiffInRealHours($date = null, $absolute = true);

/**
     * Get the difference in minutes as float (microsecond-precision) using timestamps.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return float
     */
    public function floatDiffInRealMinutes($date = null, $absolute = true);

/**
     * Get the difference in months as float (microsecond-precision) using timestamps.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return float
     */
    public function floatDiffInRealMonths($date = null, $absolute = true);

/**
     * Get the difference in seconds as float (microsecond-precision) using timestamps.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return float
     */
    public function floatDiffInRealSeconds($date = null, $absolute = true);

/**
     * Get the difference in weeks as float (microsecond-precision).
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return float
     */
    public function floatDiffInRealWeeks($date = null, $absolute = true);

/**
     * Get the difference in year as float (microsecond-precision) using timestamps.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return float
     */
    public function floatDiffInRealYears($date = null, $absolute = true);

/**
     * Get the difference in seconds as float (microsecond-precision).
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return float
     */
    public function floatDiffInSeconds($date = null, $absolute = true);

/**
     * Get the difference in year as float (microsecond-precision).
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return float
     */
    public function floatDiffInYears($date = null, $absolute = true);

/**
     * Round the current instance second with given precision if specified.
     *
     * @param float|int|string|\DateInterval|null $precision
     *
     * @return CarbonInterface
     */
    public function floor($precision = 1);

/**
     * Truncate the current instance at the given unit with given precision if specified.
     *
     * @param string    $unit
     * @param float|int $precision
     *
     * @return CarbonInterface
     */
    public function floorUnit($unit, $precision = 1);

/**
     * Truncate the current instance week.
     *
     * @param int $weekStartsAt optional start allow you to specify the day of week to use to start the week
     *
     * @return CarbonInterface
     */
    public function floorWeek($weekStartsAt = null);

/**
     * Format the instance with the current locale.  You can set the current
     * locale using setlocale() http://php.net/setlocale.
     *
     * @param string $format
     *
     * @return string
     */
    public function formatLocalized($format);

/**
     * @alias diffForHumans
     *
     * Get the difference in a human readable format in the current locale from current instance to an other
     * instance given (or now if null given).
     *
     * @param Carbon|\DateTimeInterface|string|array|null $other   if array passed, will be used as parameters array, see $syntax below;
     *                                                             if null passed, now will be used as comparison reference;
     *                                                             if any other type, it will be converted to date and used as reference.
     * @param int|array                                   $syntax  if array passed, parameters will be extracted from it, the array may contains:
     *                                                             - 'syntax' entry (see below)
     *                                                             - 'short' entry (see below)
     *                                                             - 'parts' entry (see below)
     *                                                             - 'options' entry (see below)
     *                                                             - 'join' entry determines how to join multiple parts of the string
     *                                                             `  - if $join is a string, it's used as a joiner glue
     *                                                             `  - if $join is a callable/closure, it get the list of string and should return a string
     *                                                             `  - if $join is an array, the first item will be the default glue, and the second item
     *                                                             `    will be used instead of the glue for the last item
     *                                                             `  - if $join is true, it will be guessed from the locale ('list' translation file entry)
     *                                                             `  - if $join is missing, a space will be used as glue
     *                                                             - 'other' entry (see above)
     *                                                             if int passed, it add modifiers:
     *                                                             Possible values:
     *                                                             - CarbonInterface::DIFF_ABSOLUTE          no modifiers
     *                                                             - CarbonInterface::DIFF_RELATIVE_TO_NOW   add ago/from now modifier
     *                                                             - CarbonInterface::DIFF_RELATIVE_TO_OTHER add before/after modifier
     *                                                             Default value: CarbonInterface::DIFF_ABSOLUTE
     * @param bool                                        $short   displays short format of time units
     * @param int                                         $parts   maximum number of parts to display (default value: 1: single unit)
     * @param int                                         $options human diff options
     *
     * @return string
     */
    public function from($other = null, $syntax = null, $short = false, $parts = 1, $options = null);

/**
     * Get the difference in a human readable format in the current locale from current
     * instance to now.
     *
     * @param int|array $syntax  if array passed, parameters will be extracted from it, the array may contains:
     *                           - 'syntax' entry (see below)
     *                           - 'short' entry (see below)
     *                           - 'parts' entry (see below)
     *                           - 'options' entry (see below)
     *                           - 'join' entry determines how to join multiple parts of the string
     *                           `  - if $join is a string, it's used as a joiner glue
     *                           `  - if $join is a callable/closure, it get the list of string and should return a string
     *                           `  - if $join is an array, the first item will be the default glue, and the second item
     *                           `    will be used instead of the glue for the last item
     *                           `  - if $join is true, it will be guessed from the locale ('list' translation file entry)
     *                           `  - if $join is missing, a space will be used as glue
     *                           if int passed, it add modifiers:
     *                           Possible values:
     *                           - CarbonInterface::DIFF_ABSOLUTE          no modifiers
     *                           - CarbonInterface::DIFF_RELATIVE_TO_NOW   add ago/from now modifier
     *                           - CarbonInterface::DIFF_RELATIVE_TO_OTHER add before/after modifier
     *                           Default value: CarbonInterface::DIFF_ABSOLUTE
     * @param bool      $short   displays short format of time units
     * @param int       $parts   maximum number of parts to display (default value: 1: single unit)
     * @param int       $options human diff options
     *
     * @return string
     */
    public function fromNow($syntax = null, $short = false, $parts = 1, $options = null);

/**
     * Create an instance from a serialized string.
     *
     * @param string $value
     *
     * @throws InvalidFormatException
     *
     * @return static
     */
    public static function fromSerialized($value);

/**
     * Register a custom macro.
     *
     * @param object|callable $macro
     * @param int             $priority marco with higher priority is tried first
     *
     * @return void
     */
    public static function genericMacro($macro, $priority = 0);

/**
     * Get a part of the Carbon object
     *
     * @param string $name
     *
     * @throws UnknownGetterException
     *
     * @return string|int|bool|DateTimeZone|null
     */
    public function get($name);

/**
     * Returns the alternative number for a given date property if available in the current locale.
     *
     * @param string $key date property
     *
     * @return string
     */
    public function getAltNumber(string $key): string;

/**
     * Returns the list of internally available locales and already loaded custom locales.
     * (It will ignore custom translator dynamic loading.)
     *
     * @return array
     */
    public static function getAvailableLocales();

/**
     * Returns list of Language object for each available locale. This object allow you to get the ISO name, native
     * name, region and variant of the locale.
     *
     * @return Language[]
     */
    public static function getAvailableLocalesInfo();

/**
     * Returns list of calendar formats for ISO formatting.
     *
     * @param string|null $locale current locale used if null
     *
     * @return array
     */
    public function getCalendarFormats($locale = null);

/**
     * Get the days of the week
     *
     * @return array
     */
    public static function getDays();

/**
     * Get the fallback locale.
     *
     * @see https://symfony.com/doc/current/components/translation.html#fallback-locales
     *
     * @return string|null
     */
    public static function getFallbackLocale();

/**
     * List of replacements from date() format to isoFormat().
     *
     * @return array
     */
    public static function getFormatsToIsoReplacements();

/**
     * Return default humanDiff() options (merged flags as integer).
     *
     * @return int
     */
    public static function getHumanDiffOptions();

/**
     * Returns list of locale formats for ISO formatting.
     *
     * @param string|null $locale current locale used if null
     *
     * @return array
     */
    public function getIsoFormats($locale = null);

/**
     * Returns list of locale units for ISO formatting.
     *
     * @return array
     */
    public static function getIsoUnits();

/**
     * {@inheritdoc}
     */
    public static function getLastErrors();

/**
     * Get the raw callable macro registered globally or locally for a given name.
     *
     * @param string $name
     *
     * @return callable|null
     */
    public function getLocalMacro($name);

/**
     * Get the translator of the current instance or the default if none set.
     *
     * @return \Symfony\Component\Translation\TranslatorInterface
     */
    public function getLocalTranslator();

/**
     * Get the current translator locale.
     *
     * @return string
     */
    public static function getLocale();

/**
     * Get the raw callable macro registered globally for a given name.
     *
     * @param string $name
     *
     * @return callable|null
     */
    public static function getMacro($name);

/**
     * get midday/noon hour
     *
     * @return int
     */
    public static function getMidDayAt();

/**
     * Returns the offset hour and minute formatted with +/- and a given separator (":" by default).
     * For example, if the time zone is 9 hours 30 minutes, you'll get "+09:30", with "@@" as first
     * argument, "+09@@30", with "" as first argument, "+0930". Negative offset will return something
     * like "-12:00".
     *
     * @param string $separator string to place between hours and minutes (":" by default)
     *
     * @return string
     */
    public function getOffsetString($separator = ':');

/**
     * Returns a unit of the instance padded with 0 by default or any other string if specified.
     *
     * @param string $unit      Carbon unit name
     * @param int    $length    Length of the output (2 by default)
     * @param string $padString String to use for padding ("0" by default)
     * @param int    $padType   Side(s) to pad (STR_PAD_LEFT by default)
     *
     * @return string
     */
    public function getPaddedUnit($unit, $length = 2, $padString = '0', $padType = 0);

/**
     * Returns a timestamp rounded with the given precision (6 by default).
     *
     * @example getPreciseTimestamp()   1532087464437474 (microsecond maximum precision)
     * @example getPreciseTimestamp(6)  1532087464437474
     * @example getPreciseTimestamp(5)  153208746443747  (1/100000 second precision)
     * @example getPreciseTimestamp(4)  15320874644375   (1/10000 second precision)
     * @example getPreciseTimestamp(3)  1532087464437    (millisecond precision)
     * @example getPreciseTimestamp(2)  153208746444     (1/100 second precision)
     * @example getPreciseTimestamp(1)  15320874644      (1/10 second precision)
     * @example getPreciseTimestamp(0)  1532087464       (second precision)
     * @example getPreciseTimestamp(-1) 153208746        (10 second precision)
     * @example getPreciseTimestamp(-2) 15320875         (100 second precision)
     *
     * @param int $precision
     *
     * @return float
     */
    public function getPreciseTimestamp($precision = 6);

/**
     * Returns current local settings.
     *
     * @return array
     */
    public function getSettings();

/**
     * Get the Carbon instance (real or mock) to be returned when a "now"
     * instance is created.
     *
     * @return Closure|static the current instance used for testing
     */
    public static function getTestNow();

/**
     * Return a format from H:i to H:i:s.u according to given unit precision.
     *
     * @param string $unitPrecision "minute", "second", "millisecond" or "microsecond"
     *
     * @return string
     */
    public static function getTimeFormatByPrecision($unitPrecision);

/**
     * Get the translation of the current week day name (with context for languages with multiple forms).
     *
     * @param string|null $context      whole format string
     * @param string      $keySuffix    "", "_short" or "_min"
     * @param string|null $defaultValue default value if translation missing
     *
     * @return string
     */
    public function getTranslatedDayName($context = null, $keySuffix = '', $defaultValue = null);

/**
     * Get the translation of the current abbreviated week day name (with context for languages with multiple forms).
     *
     * @param string|null $context whole format string
     *
     * @return string
     */
    public function getTranslatedMinDayName($context = null);

/**
     * Get the translation of the current month day name (with context for languages with multiple forms).
     *
     * @param string|null $context      whole format string
     * @param string      $keySuffix    "" or "_short"
     * @param string|null $defaultValue default value if translation missing
     *
     * @return string
     */
    public function getTranslatedMonthName($context = null, $keySuffix = '', $defaultValue = null);

/**
     * Get the translation of the current short week day name (with context for languages with multiple forms).
     *
     * @param string|null $context whole format string
     *
     * @return string
     */
    public function getTranslatedShortDayName($context = null);

/**
     * Get the translation of the current short month day name (with context for languages with multiple forms).
     *
     * @param string|null $context whole format string
     *
     * @return string
     */
    public function getTranslatedShortMonthName($context = null);

/**
     * Returns raw translation message for a given key.
     *
     * @param string                                             $key        key to find
     * @param string|null                                        $locale     current locale used if null
     * @param string|null                                        $default    default value if translation returns the key
     * @param \Symfony\Component\Translation\TranslatorInterface $translator an optional translator to use
     *
     * @return string
     */
    public function getTranslationMessage(string $key, string $locale = null, string $default = null, $translator = null);

/**
     * Returns raw translation message for a given key.
     *
     * @param \Symfony\Component\Translation\TranslatorInterface $translator the translator to use
     * @param string                                             $key        key to find
     * @param string|null                                        $locale     current locale used if null
     * @param string|null                                        $default    default value if translation returns the key
     *
     * @return string
     */
    public static function getTranslationMessageWith($translator, string $key, string $locale = null, string $default = null);

/**
     * Get the default translator instance in use.
     *
     * @return \Symfony\Component\Translation\TranslatorInterface
     */
    public static function getTranslator();

/**
     * Get the last day of week
     *
     * @return int
     */
    public static function getWeekEndsAt();

/**
     * Get the first day of week
     *
     * @return int
     */
    public static function getWeekStartsAt();

/**
     * Get weekend days
     *
     * @return array
     */
    public static function getWeekendDays();

/**
     * Determines if the instance is greater (after) than another
     *
     * @example
     * ```
     * Carbon::parse('2018-07-25 12:45:16')->greaterThan('2018-07-25 12:45:15'); // true
     * Carbon::parse('2018-07-25 12:45:16')->greaterThan('2018-07-25 12:45:16'); // false
     * Carbon::parse('2018-07-25 12:45:16')->greaterThan('2018-07-25 12:45:17'); // false
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
     *
     * @return bool
     */
    public function greaterThan($date): bool;

/**
     * Determines if the instance is greater (after) than or equal to another
     *
     * @example
     * ```
     * Carbon::parse('2018-07-25 12:45:16')->greaterThanOrEqualTo('2018-07-25 12:45:15'); // true
     * Carbon::parse('2018-07-25 12:45:16')->greaterThanOrEqualTo('2018-07-25 12:45:16'); // true
     * Carbon::parse('2018-07-25 12:45:16')->greaterThanOrEqualTo('2018-07-25 12:45:17'); // false
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
     *
     * @return bool
     */
    public function greaterThanOrEqualTo($date): bool;

/**
     * Determines if the instance is greater (after) than another
     *
     * @example
     * ```
     * Carbon::parse('2018-07-25 12:45:16')->gt('2018-07-25 12:45:15'); // true
     * Carbon::parse('2018-07-25 12:45:16')->gt('2018-07-25 12:45:16'); // false
     * Carbon::parse('2018-07-25 12:45:16')->gt('2018-07-25 12:45:17'); // false
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
     *
     * @see greaterThan()
     *
     * @return bool
     */
    public function gt($date): bool;

/**
     * Determines if the instance is greater (after) than or equal to another
     *
     * @example
     * ```
     * Carbon::parse('2018-07-25 12:45:16')->gte('2018-07-25 12:45:15'); // true
     * Carbon::parse('2018-07-25 12:45:16')->gte('2018-07-25 12:45:16'); // true
     * Carbon::parse('2018-07-25 12:45:16')->gte('2018-07-25 12:45:17'); // false
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
     *
     * @see greaterThanOrEqualTo()
     *
     * @return bool
     */
    public function gte($date): bool;

/**
     * Checks if the (date)time string is in a given format.
     *
     * @example
     * ```
     * Carbon::hasFormat('11:12:45', 'h:i:s'); // true
     * Carbon::hasFormat('13:12:45', 'h:i:s'); // false
     * ```
     *
     * @param string $date
     * @param string $format
     *
     * @return bool
     */
    public static function hasFormat($date, $format);

/**
     * Checks if the (date)time string is in a given format.
     *
     * @example
     * ```
     * Carbon::hasFormatWithModifiers('31/08/2015', 'd#m#Y'); // true
     * Carbon::hasFormatWithModifiers('31/08/2015', 'm#d#Y'); // false
     * ```
     *
     * @param string $date
     * @param string $format
     *
     * @return bool
     */
    public static function hasFormatWithModifiers($date, $format): bool;

/**
     * Checks if macro is registered globally or locally.
     *
     * @param string $name
     *
     * @return bool
     */
    public function hasLocalMacro($name);

/**
     * Return true if the current instance has its own translator.
     *
     * @return bool
     */
    public function hasLocalTranslator();

/**
     * Checks if macro is registered globally.
     *
     * @param string $name
     *
     * @return bool
     */
    public static function hasMacro($name);

/**
     * Determine if a time string will produce a relative date.
     *
     * @param string $time
     *
     * @return bool true if time match a relative date, false if absolute or invalid time string
     */
    public static function hasRelativeKeywords($time);

/**
     * Determine if there is a valid test instance set. A valid test instance
     * is anything that is not null.
     *
     * @return bool true if there is a test instance, otherwise false
     */
    public static function hasTestNow();

/**
     * Create a Carbon instance from a DateTime one.
     *
     * @param DateTimeInterface $date
     *
     * @return static
     */
    public static function instance($date);

/**
     * Returns true if the current date matches the given string.
     *
     * @example
     * ```
     * var_dump(Carbon::parse('2019-06-02 12:23:45')->is('2019')); // true
     * var_dump(Carbon::parse('2019-06-02 12:23:45')->is('2018')); // false
     * var_dump(Carbon::parse('2019-06-02 12:23:45')->is('2019-06')); // true
     * var_dump(Carbon::parse('2019-06-02 12:23:45')->is('06-02')); // true
     * var_dump(Carbon::parse('2019-06-02 12:23:45')->is('2019-06-02')); // true
     * var_dump(Carbon::parse('2019-06-02 12:23:45')->is('Sunday')); // true
     * var_dump(Carbon::parse('2019-06-02 12:23:45')->is('June')); // true
     * var_dump(Carbon::parse('2019-06-02 12:23:45')->is('12:23')); // true
     * var_dump(Carbon::parse('2019-06-02 12:23:45')->is('12:23:45')); // true
     * var_dump(Carbon::parse('2019-06-02 12:23:45')->is('12:23:00')); // false
     * var_dump(Carbon::parse('2019-06-02 12:23:45')->is('12h')); // true
     * var_dump(Carbon::parse('2019-06-02 15:23:45')->is('3pm')); // true
     * var_dump(Carbon::parse('2019-06-02 15:23:45')->is('3am')); // false
     * ```
     *
     * @param string $tester day name, month name, hour, date, etc. as string
     *
     * @return bool
     */
    public function is(string $tester);

/**
     * Determines if the instance is greater (after) than another
     *
     * @example
     * ```
     * Carbon::parse('2018-07-25 12:45:16')->isAfter('2018-07-25 12:45:15'); // true
     * Carbon::parse('2018-07-25 12:45:16')->isAfter('2018-07-25 12:45:16'); // false
     * Carbon::parse('2018-07-25 12:45:16')->isAfter('2018-07-25 12:45:17'); // false
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
     *
     * @see greaterThan()
     *
     * @return bool
     */
    public function isAfter($date): bool;

/**
     * Determines if the instance is less (before) than another
     *
     * @example
     * ```
     * Carbon::parse('2018-07-25 12:45:16')->isBefore('2018-07-25 12:45:15'); // false
     * Carbon::parse('2018-07-25 12:45:16')->isBefore('2018-07-25 12:45:16'); // false
     * Carbon::parse('2018-07-25 12:45:16')->isBefore('2018-07-25 12:45:17'); // true
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
     *
     * @see lessThan()
     *
     * @return bool
     */
    public function isBefore($date): bool;

/**
     * Determines if the instance is between two others
     *
     * @example
     * ```
     * Carbon::parse('2018-07-25')->isBetween('2018-07-14', '2018-08-01'); // true
     * Carbon::parse('2018-07-25')->isBetween('2018-08-01', '2018-08-20'); // false
     * Carbon::parse('2018-07-25')->isBetween('2018-07-25', '2018-08-01'); // true
     * Carbon::parse('2018-07-25')->isBetween('2018-07-25', '2018-08-01', false); // false
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date1
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date2
     * @param bool                                    $equal Indicates if an equal to comparison should be done
     *
     * @return bool
     */
    public function isBetween($date1, $date2, $equal = true): bool;

/**
     * Check if its the birthday. Compares the date/month values of the two dates.
     *
     * @example
     * ```
     * Carbon::now()->subYears(5)->isBirthday(); // true
     * Carbon::now()->subYears(5)->subDay()->isBirthday(); // false
     * Carbon::parse('2019-06-05')->isBirthday(Carbon::parse('2001-06-05')); // true
     * Carbon::parse('2019-06-05')->isBirthday(Carbon::parse('2001-06-06')); // false
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|null $date The instance to compare with or null to use current day.
     *
     * @return bool
     */
    public function isBirthday($date = null);

/**
     * Determines if the instance is in the current unit given.
     *
     * @example
     * ```
     * Carbon::now()->isCurrentUnit('hour'); // true
     * Carbon::now()->subHours(2)->isCurrentUnit('hour'); // false
     * ```
     *
     * @param string $unit The unit to test.
     *
     * @throws BadMethodCallException
     *
     * @return bool
     */
    public function isCurrentUnit($unit);

/**
     * Checks if this day is a specific day of the week.
     *
     * @example
     * ```
     * Carbon::parse('2019-07-17')->isDayOfWeek(Carbon::WEDNESDAY); // true
     * Carbon::parse('2019-07-17')->isDayOfWeek(Carbon::FRIDAY); // false
     * Carbon::parse('2019-07-17')->isDayOfWeek('Wednesday'); // true
     * Carbon::parse('2019-07-17')->isDayOfWeek('Friday'); // false
     * ```
     *
     * @param int $dayOfWeek
     *
     * @return bool
     */
    public function isDayOfWeek($dayOfWeek);

/**
     * Check if the instance is end of day.
     *
     * @example
     * ```
     * Carbon::parse('2019-02-28 23:59:59.999999')->isEndOfDay(); // true
     * Carbon::parse('2019-02-28 23:59:59.123456')->isEndOfDay(); // true
     * Carbon::parse('2019-02-28 23:59:59')->isEndOfDay(); // true
     * Carbon::parse('2019-02-28 23:59:58.999999')->isEndOfDay(); // false
     * Carbon::parse('2019-02-28 23:59:59.999999')->isEndOfDay(true); // true
     * Carbon::parse('2019-02-28 23:59:59.123456')->isEndOfDay(true); // false
     * Carbon::parse('2019-02-28 23:59:59')->isEndOfDay(true); // false
     * ```
     *
     * @param bool $checkMicroseconds check time at microseconds precision
     *
     * @return bool
     */
    public function isEndOfDay($checkMicroseconds = false);

/**
     * Determines if the instance is in the future, ie. greater (after) than now.
     *
     * @example
     * ```
     * Carbon::now()->addHours(5)->isFuture(); // true
     * Carbon::now()->subHours(5)->isFuture(); // false
     * ```
     *
     * @return bool
     */
    public function isFuture();

/**
     * Returns true if the current class/instance is immutable.
     *
     * @return bool
     */
    public static function isImmutable();

/**
     * Check if today is the last day of the Month
     *
     * @example
     * ```
     * Carbon::parse('2019-02-28')->isLastOfMonth(); // true
     * Carbon::parse('2019-03-28')->isLastOfMonth(); // false
     * Carbon::parse('2019-03-30')->isLastOfMonth(); // false
     * Carbon::parse('2019-03-31')->isLastOfMonth(); // true
     * Carbon::parse('2019-04-30')->isLastOfMonth(); // true
     * ```
     *
     * @return bool
     */
    public function isLastOfMonth();

/**
     * Determines if the instance is a leap year.
     *
     * @example
     * ```
     * Carbon::parse('2020-01-01')->isLeapYear(); // true
     * Carbon::parse('2019-01-01')->isLeapYear(); // false
     * ```
     *
     * @return bool
     */
    public function isLeapYear();

/**
     * Determines if the instance is a long year
     *
     * @example
     * ```
     * Carbon::parse('2015-01-01')->isLongYear(); // true
     * Carbon::parse('2016-01-01')->isLongYear(); // false
     * ```
     *
     * @see https://en.wikipedia.org/wiki/ISO_8601#Week_dates
     *
     * @return bool
     */
    public function isLongYear();

/**
     * Check if the instance is midday.
     *
     * @example
     * ```
     * Carbon::parse('2019-02-28 11:59:59.999999')->isMidday(); // false
     * Carbon::parse('2019-02-28 12:00:00')->isMidday(); // true
     * Carbon::parse('2019-02-28 12:00:00.999999')->isMidday(); // true
     * Carbon::parse('2019-02-28 12:00:01')->isMidday(); // false
     * ```
     *
     * @return bool
     */
    public function isMidday();

/**
     * Check if the instance is start of day / midnight.
     *
     * @example
     * ```
     * Carbon::parse('2019-02-28 00:00:00')->isMidnight(); // true
     * Carbon::parse('2019-02-28 00:00:00.999999')->isMidnight(); // true
     * Carbon::parse('2019-02-28 00:00:01')->isMidnight(); // false
     * ```
     *
     * @return bool
     */
    public function isMidnight();

/**
     * Returns true if a property can be changed via setter.
     *
     * @param string $unit
     *
     * @return bool
     */
    public static function isModifiableUnit($unit);

/**
     * Returns true if the current class/instance is mutable.
     *
     * @return bool
     */
    public static function isMutable();

/**
     * Determines if the instance is in the past, ie. less (before) than now.
     *
     * @example
     * ```
     * Carbon::now()->subHours(5)->isPast(); // true
     * Carbon::now()->addHours(5)->isPast(); // false
     * ```
     *
     * @return bool
     */
    public function isPast();

/**
     * Compares the formatted values of the two dates.
     *
     * @example
     * ```
     * Carbon::parse('2019-06-13')->isSameAs('Y-d', Carbon::parse('2019-12-13')); // true
     * Carbon::parse('2019-06-13')->isSameAs('Y-d', Carbon::parse('2019-06-14')); // false
     * ```
     *
     * @param string                                        $format date formats to compare.
     * @param \Carbon\Carbon|\DateTimeInterface|string|null $date   instance to compare with or null to use current day.
     *
     * @return bool
     */
    public function isSameAs($format, $date = null);

/**
     * Checks if the passed in date is in the same month as the instance´s month.
     *
     * @example
     * ```
     * Carbon::parse('2019-01-12')->isSameMonth(Carbon::parse('2019-01-01')); // true
     * Carbon::parse('2019-01-12')->isSameMonth(Carbon::parse('2019-02-01')); // false
     * Carbon::parse('2019-01-12')->isSameMonth(Carbon::parse('2018-01-01')); // false
     * Carbon::parse('2019-01-12')->isSameMonth(Carbon::parse('2018-01-01'), false); // true
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|null $date       The instance to compare with or null to use the current date.
     * @param bool                                   $ofSameYear Check if it is the same month in the same year.
     *
     * @return bool
     */
    public function isSameMonth($date = null, $ofSameYear = true);

/**
     * Checks if the passed in date is in the same quarter as the instance quarter (and year if needed).
     *
     * @example
     * ```
     * Carbon::parse('2019-01-12')->isSameQuarter(Carbon::parse('2019-03-01')); // true
     * Carbon::parse('2019-01-12')->isSameQuarter(Carbon::parse('2019-04-01')); // false
     * Carbon::parse('2019-01-12')->isSameQuarter(Carbon::parse('2018-03-01')); // false
     * Carbon::parse('2019-01-12')->isSameQuarter(Carbon::parse('2018-03-01'), false); // true
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|string|null $date       The instance to compare with or null to use current day.
     * @param bool                                          $ofSameYear Check if it is the same month in the same year.
     *
     * @return bool
     */
    public function isSameQuarter($date = null, $ofSameYear = true);

/**
     * Determines if the instance is in the current unit given.
     *
     * @example
     * ```
     * Carbon::parse('2019-01-13')->isSameUnit('year', Carbon::parse('2019-12-25')); // true
     * Carbon::parse('2018-12-13')->isSameUnit('year', Carbon::parse('2019-12-25')); // false
     * ```
     *
     * @param string                                 $unit singular unit string
     * @param \Carbon\Carbon|\DateTimeInterface|null $date instance to compare with or null to use current day.
     *
     * @throws BadComparisonUnitException
     *
     * @return bool
     */
    public function isSameUnit($unit, $date = null);

/**
     * Check if the instance is start of day / midnight.
     *
     * @example
     * ```
     * Carbon::parse('2019-02-28 00:00:00')->isStartOfDay(); // true
     * Carbon::parse('2019-02-28 00:00:00.999999')->isStartOfDay(); // true
     * Carbon::parse('2019-02-28 00:00:01')->isStartOfDay(); // false
     * Carbon::parse('2019-02-28 00:00:00.000000')->isStartOfDay(true); // true
     * Carbon::parse('2019-02-28 00:00:00.000012')->isStartOfDay(true); // false
     * ```
     *
     * @param bool $checkMicroseconds check time at microseconds precision
     *
     * @return bool
     */
    public function isStartOfDay($checkMicroseconds = false);

/**
     * Returns true if the strict mode is globally in use, false else.
     * (It can be overridden in specific instances.)
     *
     * @return bool
     */
    public static function isStrictModeEnabled();

/**
     * Determines if the instance is today.
     *
     * @example
     * ```
     * Carbon::today()->isToday(); // true
     * Carbon::tomorrow()->isToday(); // false
     * ```
     *
     * @return bool
     */
    public function isToday();

/**
     * Determines if the instance is tomorrow.
     *
     * @example
     * ```
     * Carbon::tomorrow()->isTomorrow(); // true
     * Carbon::yesterday()->isTomorrow(); // false
     * ```
     *
     * @return bool
     */
    public function isTomorrow();

/**
     * Determines if the instance is a weekday.
     *
     * @example
     * ```
     * Carbon::parse('2019-07-14')->isWeekday(); // false
     * Carbon::parse('2019-07-15')->isWeekday(); // true
     * ```
     *
     * @return bool
     */
    public function isWeekday();

/**
     * Determines if the instance is a weekend day.
     *
     * @example
     * ```
     * Carbon::parse('2019-07-14')->isWeekend(); // true
     * Carbon::parse('2019-07-15')->isWeekend(); // false
     * ```
     *
     * @return bool
     */
    public function isWeekend();

/**
     * Determines if the instance is yesterday.
     *
     * @example
     * ```
     * Carbon::yesterday()->isYesterday(); // true
     * Carbon::tomorrow()->isYesterday(); // false
     * ```
     *
     * @return bool
     */
    public function isYesterday();

/**
     * Format in the current language using ISO replacement patterns.
     *
     * @param string      $format
     * @param string|null $originalFormat provide context if a chunk has been passed alone
     *
     * @return string
     */
    public function isoFormat(string $format, string $originalFormat = null): string;

/**
     * Get/set the week number using given first day of week and first
     * day of year included in the first week. Or use ISO format if no settings
     * given.
     *
     * @param int|null $week
     * @param int|null $dayOfWeek
     * @param int|null $dayOfYear
     *
     * @return int|static
     */
    public function isoWeek($week = null, $dayOfWeek = null, $dayOfYear = null);

/**
     * Set/get the week number of year using given first day of week and first
     * day of year included in the first week. Or use ISO format if no settings
     * given.
     *
     * @param int|null $year      if null, act as a getter, if not null, set the year and return current instance.
     * @param int|null $dayOfWeek first date of week from 0 (Sunday) to 6 (Saturday)
     * @param int|null $dayOfYear first day of year included in the week #1
     *
     * @return int|static
     */
    public function isoWeekYear($year = null, $dayOfWeek = null, $dayOfYear = null);

/**
     * Get/set the ISO weekday from 1 (Monday) to 7 (Sunday).
     *
     * @param int|null $value new value for weekday if using as setter.
     *
     * @return static|int
     */
    public function isoWeekday($value = null);

/**
     * Get the number of weeks of the current week-year using given first day of week and first
     * day of year included in the first week. Or use ISO format if no settings
     * given.
     *
     * @param int|null $dayOfWeek first date of week from 0 (Sunday) to 6 (Saturday)
     * @param int|null $dayOfYear first day of year included in the week #1
     *
     * @return int
     */
    public function isoWeeksInYear($dayOfWeek = null, $dayOfYear = null);

/**
     * Prepare the object for JSON serialization.
     *
     * @return array|string
     */
    public function jsonSerialize();

/**
     * Modify to the last occurrence of a given day of the week
     * in the current month. If no dayOfWeek is provided, modify to the
     * last day of the current month.  Use the supplied constants
     * to indicate the desired dayOfWeek, ex. static::MONDAY.
     *
     * @param int|null $dayOfWeek
     *
     * @return static
     */
    public function lastOfMonth($dayOfWeek = null);

/**
     * Modify to the last occurrence of a given day of the week
     * in the current quarter. If no dayOfWeek is provided, modify to the
     * last day of the current quarter.  Use the supplied constants
     * to indicate the desired dayOfWeek, ex. static::MONDAY.
     *
     * @param int|null $dayOfWeek day of the week default null
     *
     * @return static
     */
    public function lastOfQuarter($dayOfWeek = null);

/**
     * Modify to the last occurrence of a given day of the week
     * in the current year. If no dayOfWeek is provided, modify to the
     * last day of the current year.  Use the supplied constants
     * to indicate the desired dayOfWeek, ex. static::MONDAY.
     *
     * @param int|null $dayOfWeek day of the week default null
     *
     * @return static
     */
    public function lastOfYear($dayOfWeek = null);

/**
     * Determines if the instance is less (before) than another
     *
     * @example
     * ```
     * Carbon::parse('2018-07-25 12:45:16')->lessThan('2018-07-25 12:45:15'); // false
     * Carbon::parse('2018-07-25 12:45:16')->lessThan('2018-07-25 12:45:16'); // false
     * Carbon::parse('2018-07-25 12:45:16')->lessThan('2018-07-25 12:45:17'); // true
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
     *
     * @return bool
     */
    public function lessThan($date): bool;

/**
     * Determines if the instance is less (before) or equal to another
     *
     * @example
     * ```
     * Carbon::parse('2018-07-25 12:45:16')->lessThanOrEqualTo('2018-07-25 12:45:15'); // false
     * Carbon::parse('2018-07-25 12:45:16')->lessThanOrEqualTo('2018-07-25 12:45:16'); // true
     * Carbon::parse('2018-07-25 12:45:16')->lessThanOrEqualTo('2018-07-25 12:45:17'); // true
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
     *
     * @return bool
     */
    public function lessThanOrEqualTo($date): bool;

/**
     * Get/set the locale for the current instance.
     *
     * @param string|null $locale
     * @param string      ...$fallbackLocales
     *
     * @return $this|string
     */
    public function locale(string $locale = null, ...$fallbackLocales);

/**
     * Returns true if the given locale is internally supported and has words for 1-day diff (just now, yesterday, tomorrow).
     * Support is considered enabled if the 3 words are translated in the given locale.
     *
     * @param string $locale locale ex. en
     *
     * @return bool
     */
    public static function localeHasDiffOneDayWords($locale);

/**
     * Returns true if the given locale is internally supported and has diff syntax support (ago, from now, before, after).
     * Support is considered enabled if the 4 sentences are translated in the given locale.
     *
     * @param string $locale locale ex. en
     *
     * @return bool
     */
    public static function localeHasDiffSyntax($locale);

/**
     * Returns true if the given locale is internally supported and has words for 2-days diff (before yesterday, after tomorrow).
     * Support is considered enabled if the 2 words are translated in the given locale.
     *
     * @param string $locale locale ex. en
     *
     * @return bool
     */
    public static function localeHasDiffTwoDayWords($locale);

/**
     * Returns true if the given locale is internally supported and has period syntax support (X times, every X, from X, to X).
     * Support is considered enabled if the 4 sentences are translated in the given locale.
     *
     * @param string $locale locale ex. en
     *
     * @return bool
     */
    public static function localeHasPeriodSyntax($locale);

/**
     * Returns true if the given locale is internally supported and has short-units support.
     * Support is considered enabled if either year, day or hour has a short variant translated.
     *
     * @param string $locale locale ex. en
     *
     * @return bool
     */
    public static function localeHasShortUnits($locale);

/**
     * Determines if the instance is less (before) than another
     *
     * @example
     * ```
     * Carbon::parse('2018-07-25 12:45:16')->lt('2018-07-25 12:45:15'); // false
     * Carbon::parse('2018-07-25 12:45:16')->lt('2018-07-25 12:45:16'); // false
     * Carbon::parse('2018-07-25 12:45:16')->lt('2018-07-25 12:45:17'); // true
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
     *
     * @see lessThan()
     *
     * @return bool
     */
    public function lt($date): bool;

/**
     * Determines if the instance is less (before) or equal to another
     *
     * @example
     * ```
     * Carbon::parse('2018-07-25 12:45:16')->lte('2018-07-25 12:45:15'); // false
     * Carbon::parse('2018-07-25 12:45:16')->lte('2018-07-25 12:45:16'); // true
     * Carbon::parse('2018-07-25 12:45:16')->lte('2018-07-25 12:45:17'); // true
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
     *
     * @see lessThanOrEqualTo()
     *
     * @return bool
     */
    public function lte($date): bool;

/**
     * Register a custom macro.
     *
     * @example
     * ```
     * $userSettings = [
     *   'locale' => 'pt',
     *   'timezone' => 'America/Sao_Paulo',
     * ];
     * Carbon::macro('userFormat', function () use ($userSettings) {
     *   return $this->copy()->locale($userSettings['locale'])->tz($userSettings['timezone'])->calendar();
     * });
     * echo Carbon::yesterday()->hours(11)->userFormat();
     * ```
     *
     * @param string          $name
     * @param object|callable $macro
     *
     * @return void
     */
    public static function macro($name, $macro);

/**
     * Make a Carbon instance from given variable if possible.
     *
     * Always return a new instance. Parse only strings and only these likely to be dates (skip intervals
     * and recurrences). Throw an exception for invalid format, but otherwise return null.
     *
     * @param mixed $var
     *
     * @throws InvalidFormatException
     *
     * @return static|null
     */
    public static function make($var);

/**
     * Get the maximum instance between a given instance (default now) and the current instance.
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
     *
     * @return static
     */
    public function max($date = null);

/**
     * Create a Carbon instance for the greatest supported date.
     *
     * @return static
     */
    public static function maxValue();

/**
     * Get the maximum instance between a given instance (default now) and the current instance.
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
     *
     * @see max()
     *
     * @return static
     */
    public function maximum($date = null);

/**
     * Return the meridiem of the current time in the current locale.
     *
     * @param bool $isLower if true, returns lowercase variant if available in the current locale.
     *
     * @return string
     */
    public function meridiem(bool $isLower = false): string;

/**
     * Modify to midday, default to self::$midDayAt
     *
     * @return static
     */
    public function midDay();

/**
     * Get the minimum instance between a given instance (default now) and the current instance.
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
     *
     * @return static
     */
    public function min($date = null);

/**
     * Create a Carbon instance for the lowest supported date.
     *
     * @return static
     */
    public static function minValue();

/**
     * Get the minimum instance between a given instance (default now) and the current instance.
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
     *
     * @see min()
     *
     * @return static
     */
    public function minimum($date = null);

/**
     * Mix another object into the class.
     *
     * @example
     * ```
     * Carbon::mixin(new class {
     *   public function addMoon() {
     *     return function () {
     *       return $this->addDays(30);
     *     };
     *   }
     *   public function subMoon() {
     *     return function () {
     *       return $this->subDays(30);
     *     };
     *   }
     * });
     * $fullMoon = Carbon::create('2018-12-22');
     * $nextFullMoon = $fullMoon->addMoon();
     * $blackMoon = Carbon::create('2019-01-06');
     * $previousBlackMoon = $blackMoon->subMoon();
     * echo "$nextFullMoon\n";
     * echo "$previousBlackMoon\n";
     * ```
     *
     * @param object|string $mixin
     *
     * @throws ReflectionException
     *
     * @return void
     */
    public static function mixin($mixin);

/**
     * Calls \DateTime::modify if mutable or \DateTimeImmutable::modify else.
     *
     * @see https://php.net/manual/en/datetime.modify.php
     */
    public function modify($modify);

/**
     * Determines if the instance is not equal to another
     *
     * @example
     * ```
     * Carbon::parse('2018-07-25 12:45:16')->ne('2018-07-25 12:45:16'); // false
     * Carbon::parse('2018-07-25 12:45:16')->ne(Carbon::parse('2018-07-25 12:45:16')); // false
     * Carbon::parse('2018-07-25 12:45:16')->ne('2018-07-25 12:45:17'); // true
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
     *
     * @see notEqualTo()
     *
     * @return bool
     */
    public function ne($date): bool;

/**
     * Modify to the next occurrence of a given modifier such as a day of
     * the week. If no modifier is provided, modify to the next occurrence
     * of the current day of the week. Use the supplied constants
     * to indicate the desired dayOfWeek, ex. static::MONDAY.
     *
     * @param string|int|null $modifier
     *
     * @return static
     */
    public function next($modifier = null);

/**
     * Go forward to the next weekday.
     *
     * @return static
     */
    public function nextWeekday();

/**
     * Go forward to the next weekend day.
     *
     * @return static
     */
    public function nextWeekendDay();

/**
     * Determines if the instance is not equal to another
     *
     * @example
     * ```
     * Carbon::parse('2018-07-25 12:45:16')->notEqualTo('2018-07-25 12:45:16'); // false
     * Carbon::parse('2018-07-25 12:45:16')->notEqualTo(Carbon::parse('2018-07-25 12:45:16')); // false
     * Carbon::parse('2018-07-25 12:45:16')->notEqualTo('2018-07-25 12:45:17'); // true
     * ```
     *
     * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
     *
     * @return bool
     */
    public function notEqualTo($date): bool;

/**
     * Get a Carbon instance for the current date and time.
     *
     * @param DateTimeZone|string|null $tz
     *
     * @return static
     */
    public static function now($tz = null);

/**
     * Returns a present instance in the same timezone.
     *
     * @return static
     */
    public function nowWithSameTz();

/**
     * Modify to the given occurrence of a given day of the week
     * in the current month. If the calculated occurrence is outside the scope
     * of the current month, then return false and no modifications are made.
     * Use the supplied constants to indicate the desired dayOfWeek, ex. static::MONDAY.
     *
     * @param int $nth
     * @param int $dayOfWeek
     *
     * @return mixed
     */
    public function nthOfMonth($nth, $dayOfWeek);

/**
     * Modify to the given occurrence of a given day of the week
     * in the current quarter. If the calculated occurrence is outside the scope
     * of the current quarter, then return false and no modifications are made.
     * Use the supplied constants to indicate the desired dayOfWeek, ex. static::MONDAY.
     *
     * @param int $nth
     * @param int $dayOfWeek
     *
     * @return mixed
     */
    public function nthOfQuarter($nth, $dayOfWeek);

/**
     * Modify to the given occurrence of a given day of the week
     * in the current year. If the calculated occurrence is outside the scope
     * of the current year, then return false and no modifications are made.
     * Use the supplied constants to indicate the desired dayOfWeek, ex. static::MONDAY.
     *
     * @param int $nth
     * @param int $dayOfWeek
     *
     * @return mixed
     */
    public function nthOfYear($nth, $dayOfWeek);

/**
     * Return a property with its ordinal.
     *
     * @param string      $key
     * @param string|null $period
     *
     * @return string
     */
    public function ordinal(string $key, string $period = null): string;

/**
     * Create a carbon instance from a string.
     *
     * This is an alias for the constructor that allows better fluent syntax
     * as it allows you to do Carbon::parse('Monday next week')->fn() rather
     * than (new Carbon('Monday next week'))->fn().
     *
     * @param string|DateTimeInterface|null $time
     * @param DateTimeZone|string|null      $tz
     *
     * @throws InvalidFormatException
     *
     * @return static
     */
    public static function parse($time = null, $tz = null);

/**
     * Create a carbon instance from a localized string (in French, Japanese, Arabic, etc.).
     *
     * @param string                   $time   date/time string in the given language (may also contain English).
     * @param string|null              $locale if locale is null or not specified, current global locale will be
     *                                         used instead.
     * @param DateTimeZone|string|null $tz     optional timezone for the new instance.
     *
     * @throws InvalidFormatException
     *
     * @return static
     */
    public static function parseFromLocale($time, $locale = null, $tz = null);

/**
     * Returns standardized plural of a given singular/plural unit name (in English).
     *
     * @param string $unit
     *
     * @return string
     */
    public static function pluralUnit(string $unit): string;

/**
     * Modify to the previous occurrence of a given modifier such as a day of
     * the week. If no dayOfWeek is provided, modify to the previous occurrence
     * of the current day of the week. Use the supplied constants
     * to indicate the desired dayOfWeek, ex. static::MONDAY.
     *
     * @param string|int|null $modifier
     *
     * @return static
     */
    public function previous($modifier = null);

/**
     * Go backward to the previous weekday.
     *
     * @return static
     */
    public function previousWeekday();

/**
     * Go backward to the previous weekend day.
     *
     * @return static
     */
    public function previousWeekendDay();

/**
     * Create a iterable CarbonPeriod object from current date to a given end date (and optional interval).
     *
     * @param \DateTimeInterface|Carbon|CarbonImmutable|null $end      period end date
     * @param int|\DateInterval|string|null                  $interval period default interval or number of the given $unit
     * @param string|null                                    $unit     if specified, $interval must be an integer
     *
     * @return CarbonPeriod
     */
    public function range($end = null, $interval = null, $unit = null);

/**
     * Call native PHP DateTime/DateTimeImmutable add() method.
     *
     * @param DateInterval $interval
     *
     * @return static
     */
    public function rawAdd(DateInterval $interval);

/**
     * @see https://php.net/manual/en/datetime.format.php
     *
     * @param string $format
     *
     * @return string
     */
    public function rawFormat($format);

/**
     * Call native PHP DateTime/DateTimeImmutable sub() method.
     *
     * @param DateInterval $interval
     *
     * @return static
     */
    public function rawSub(DateInterval $interval);

/**
     * Remove all macros and generic macros.
     */
    public static function resetMacros();

/**
     * @deprecated To avoid conflict between different third-party libraries, static setters should not be used.
     *             You should rather use the ->settings() method.
     *             Or you can use method variants: addMonthsWithOverflow/addMonthsNoOverflow, same variants
     *             are available for quarters, years, decade, centuries, millennia (singular and plural forms).
     * @see settings
     *
     * Reset the month overflow behavior.
     *
     * @return void
     */
    public static function resetMonthsOverflow();

/**
     * Reset the format used to the default when type juggling a Carbon instance to a string
     *
     * @return void
     */
    public static function resetToStringFormat();

/**
     * @deprecated To avoid conflict between different third-party libraries, static setters should not be used.
     *             You should rather use the ->settings() method.
     *             Or you can use method variants: addYearsWithOverflow/addYearsNoOverflow, same variants
     *             are available for quarters, years, decade, centuries, millennia (singular and plural forms).
     * @see settings
     *
     * Reset the month overflow behavior.
     *
     * @return void
     */
    public static function resetYearsOverflow();

/**
     * Round the current instance second with given precision if specified.
     *
     * @param float|int|string|\DateInterval|null $precision
     * @param string                              $function
     *
     * @return CarbonInterface
     */
    public function round($precision = 1, $function = 'round');

/**
     * Round the current instance at the given unit with given precision if specified and the given function.
     *
     * @param string    $unit
     * @param float|int $precision
     * @param string    $function
     *
     * @return CarbonInterface
     */
    public function roundUnit($unit, $precision = 1, $function = 'round');

/**
     * Round the current instance week.
     *
     * @param int $weekStartsAt optional start allow you to specify the day of week to use to start the week
     *
     * @return CarbonInterface
     */
    public function roundWeek($weekStartsAt = null);

/**
     * The number of seconds since midnight.
     *
     * @return int
     */
    public function secondsSinceMidnight();

/**
     * The number of seconds until 23:59:59.
     *
     * @return int
     */
    public function secondsUntilEndOfDay();

/**
     * Return a serialized string of the instance.
     *
     * @return string
     */
    public function serialize();

/**
     * @deprecated To avoid conflict between different third-party libraries, static setters should not be used.
     *             You should rather transform Carbon object before the serialization.
     *
     * JSON serialize all Carbon instances using the given callback.
     *
     * @param callable $callback
     *
     * @return void
     */
    public static function serializeUsing($callback);

/**
     * Set a part of the Carbon object
     *
     * @param string|array            $name
     * @param string|int|DateTimeZone $value
     *
     * @throws ImmutableException|UnknownSetterException
     *
     * @return $this
     */
    public function set($name, $value = null);

/**
     * Set the date with gregorian year, month and day numbers.
     *
     * @see https://php.net/manual/en/datetime.setdate.php
     *
     * @param int $year
     * @param int $month
     * @param int $day
     *
     * @return static
     */
    public function setDate($year, $month, $day);

/**
     * Set the year, month, and date for this instance to that of the passed instance.
     *
     * @param Carbon|DateTimeInterface $date now if null
     *
     * @return static
     */
    public function setDateFrom($date = null);

/**
     * Set the date and time all together.
     *
     * @param int $year
     * @param int $month
     * @param int $day
     * @param int $hour
     * @param int $minute
     * @param int $second
     * @param int $microseconds
     *
     * @return static
     */
    public function setDateTime($year, $month, $day, $hour, $minute, $second = 0, $microseconds = 0);

/**
     * Set the date and time for this instance to that of the passed instance.
     *
     * @param Carbon|DateTimeInterface $date
     *
     * @return static
     */
    public function setDateTimeFrom($date = null);

/**
     * Set the fallback locale.
     *
     * @see https://symfony.com/doc/current/components/translation.html#fallback-locales
     *
     * @param string $locale
     */
    public static function setFallbackLocale($locale);

/**
     * @deprecated To avoid conflict between different third-party libraries, static setters should not be used.
     *             You should rather use the ->settings() method.
     * @see settings
     *
     * @param int $humanDiffOptions
     */
    public static function setHumanDiffOptions($humanDiffOptions);

/**
     * Set a date according to the ISO 8601 standard - using weeks and day offsets rather than specific dates.
     *
     * @see https://php.net/manual/en/datetime.setisodate.php
     *
     * @param int $year
     * @param int $week
     * @param int $day
     *
     * @return static
     */
    public function setISODate($year, $week, $day = 1);

/**
     * Set the translator for the current instance.
     *
     * @param \Symfony\Component\Translation\TranslatorInterface $translator
     *
     * @return $this
     */
    public function setLocalTranslator(\Symfony\Component\Translation\TranslatorInterface $translator);

/**
     * Set the current translator locale and indicate if the source locale file exists.
     * Pass 'auto' as locale to use closest language from the current LC_TIME locale.
     *
     * @param string $locale locale ex. en
     *
     * @return bool
     */
    public static function setLocale($locale);

/**
     * @deprecated To avoid conflict between different third-party libraries, static setters should not be used.
     *             You should rather consider mid-day is always 12pm, then if you need to test if it's an other
     *             hour, test it explicitly:
     *                 $date->format('G') == 13
     *             or to set explicitly to a given hour:
     *                 $date->setTime(13, 0, 0, 0)
     *
     * Set midday/noon hour
     *
     * @param int $hour midday hour
     *
     * @return void
     */
    public static function setMidDayAt($hour);

/**
     * Set a Carbon instance (real or mock) to be returned when a "now"
     * instance is created.  The provided instance will be returned
     * specifically under the following conditions:
     *   - A call to the static now() method, ex. Carbon::now()
     *   - When a null (or blank string) is passed to the constructor or parse(), ex. new Carbon(null)
     *   - When the string "now" is passed to the constructor or parse(), ex. new Carbon('now')
     *   - When a string containing the desired time is passed to Carbon::parse().
     *
     * Note the timezone parameter was left out of the examples above and
     * has no affect as the mock value will be returned regardless of its value.
     *
     * To clear the test instance call this method using the default
     * parameter of null.
     *
     * /!\ Use this method for unit tests only.
     *
     * @param Closure|static|string|false|null $testNow real or mock Carbon instance
     */
    public static function setTestNow($testNow = null);

/**
     * Resets the current time of the DateTime object to a different time.
     *
     * @see https://php.net/manual/en/datetime.settime.php
     *
     * @param int $hour
     * @param int $minute
     * @param int $second
     * @param int $microseconds
     *
     * @return static
     */
    public function setTime($hour, $minute, $second = 0, $microseconds = 0);

/**
     * Set the hour, minute, second and microseconds for this instance to that of the passed instance.
     *
     * @param Carbon|DateTimeInterface $date now if null
     *
     * @return static
     */
    public function setTimeFrom($date = null);

/**
     * Set the time by time string.
     *
     * @param string $time
     *
     * @return static
     */
    public function setTimeFromTimeString($time);

/**
     * Set the instance's timestamp.
     *
     * Timestamp input can be given as int, float or a string containing one or more numbers.
     *
     * @param float|int|string $unixTimestamp
     *
     * @return static
     */
    public function setTimestamp($unixTimestamp);

/**
     * Set the instance's timezone from a string or object.
     *
     * @param DateTimeZone|string $value
     *
     * @return static
     */
    public function setTimezone($value);

/**
     * @deprecated To avoid conflict between different third-party libraries, static setters should not be used.
     *             You should rather let Carbon object being casted to string with DEFAULT_TO_STRING_FORMAT, and
     *             use other method or custom format passed to format() method if you need to dump an other string
     *             format.
     *
     * Set the default format used when type juggling a Carbon instance to a string
     *
     * @param string|Closure|null $format
     *
     * @return void
     */
    public static function setToStringFormat($format);

/**
     * Set the default translator instance to use.
     *
     * @param \Symfony\Component\Translation\TranslatorInterface $translator
     *
     * @return void
     */
    public static function setTranslator(\Symfony\Component\Translation\TranslatorInterface $translator);

/**
     * Set specified unit to new given value.
     *
     * @param string $unit  year, month, day, hour, minute, second or microsecond
     * @param int    $value new value for given unit
     *
     * @return static
     */
    public function setUnit($unit, $value = null);

/**
     * Set any unit to a new value without overflowing current other unit given.
     *
     * @param string $valueUnit    unit name to modify
     * @param int    $value        new value for the input unit
     * @param string $overflowUnit unit name to not overflow
     *
     * @return static
     */
    public function setUnitNoOverflow($valueUnit, $value, $overflowUnit);

/**
     * @deprecated To avoid conflict between different third-party libraries, static setters should not be used.
     *             You should rather use UTF-8 language packages on every machine.
     *
     * Set if UTF8 will be used for localized date/time.
     *
     * @param bool $utf8
     */
    public static function setUtf8($utf8);

/**
     * @deprecated To avoid conflict between different third-party libraries, static setters should not be used.
     *             Use $weekStartsAt optional parameter instead when using startOfWeek, floorWeek, ceilWeek
     *             or roundWeek method. You can also use the 'first_day_of_week' locale setting to change the
     *             start of week according to current locale selected and implicitly the end of week.
     *
     * Set the last day of week
     *
     * @param int|string $day week end day (or 'auto' to get the day before the first day of week
     *                        from Carbon::getLocale() culture).
     *
     * @return void
     */
    public static function setWeekEndsAt($day);

/**
     * @deprecated To avoid conflict between different third-party libraries, static setters should not be used.
     *             Use $weekEndsAt optional parameter instead when using endOfWeek method. You can also use the
     *             'first_day_of_week' locale setting to change the start of week according to current locale
     *             selected and implicitly the end of week.
     *
     * Set the first day of week
     *
     * @param int|string $day week start day (or 'auto' to get the first day of week from Carbon::getLocale() culture).
     *
     * @return void
     */
    public static function setWeekStartsAt($day);

/**
     * @deprecated To avoid conflict between different third-party libraries, static setters should not be used.
     *             You should rather consider week-end is always saturday and sunday, and if you have some custom
     *             week-end days to handle, give to those days an other name and create a macro for them:
     *
     *             ```
     *             Carbon::macro('isDayOff', function ($date) {
     *                 return $date->isSunday() || $date->isMonday();
     *             });
     *             Carbon::macro('isNotDayOff', function ($date) {
     *                 return !$date->isDayOff();
     *             });
     *             if ($someDate->isDayOff()) ...
     *             if ($someDate->isNotDayOff()) ...
     *             // Add 5 not-off days
     *             $count = 5;
     *             while ($someDate->isDayOff() || ($count-- > 0)) {
     *                 $someDate->addDay();
     *             }
     *             ```
     *
     * Set weekend days
     *
     * @param array $days
     *
     * @return void
     */
    public static function setWeekendDays($days);

/**
     * Set specific options.
     *  - strictMode: true|false|null
     *  - monthOverflow: true|false|null
     *  - yearOverflow: true|false|null
     *  - humanDiffOptions: int|null
     *  - toStringFormat: string|Closure|null
     *  - toJsonFormat: string|Closure|null
     *  - locale: string|null
     *  - timezone: \DateTimeZone|string|int|null
     *  - macros: array|null
     *  - genericMacros: array|null
     *
     * @param array $settings
     *
     * @return $this|static
     */
    public function settings(array $settings);

/**
     * Set the instance's timezone from a string or object and add/subtract the offset difference.
     *
     * @param DateTimeZone|string $value
     *
     * @return static
     */
    public function shiftTimezone($value);

/**
     * Get the month overflow global behavior (can be overridden in specific instances).
     *
     * @return bool
     */
    public static function shouldOverflowMonths();

/**
     * Get the month overflow global behavior (can be overridden in specific instances).
     *
     * @return bool
     */
    public static function shouldOverflowYears();

/**
     * @alias diffForHumans
     *
     * Get the difference in a human readable format in the current locale from current instance to an other
     * instance given (or now if null given).
     */
    public function since($other = null, $syntax = null, $short = false, $parts = 1, $options = null);

/**
     * Returns standardized singular of a given singular/plural unit name (in English).
     *
     * @param string $unit
     *
     * @return string
     */
    public static function singularUnit(string $unit): string;

/**
     * Modify to start of current given unit.
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16.334455')
     *   ->startOf('month')
     *   ->endOf('week', Carbon::FRIDAY);
     * ```
     *
     * @param string            $unit
     * @param array<int, mixed> $params
     *
     * @return static
     */
    public function startOf($unit, ...$params);

/**
     * Resets the date to the first day of the century and the time to 00:00:00
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->startOfCentury();
     * ```
     *
     * @return static
     */
    public function startOfCentury();

/**
     * Resets the time to 00:00:00 start of day
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->startOfDay();
     * ```
     *
     * @return static
     */
    public function startOfDay();

/**
     * Resets the date to the first day of the decade and the time to 00:00:00
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->startOfDecade();
     * ```
     *
     * @return static
     */
    public function startOfDecade();

/**
     * Modify to start of current hour, minutes and seconds become 0
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->startOfHour();
     * ```
     *
     * @return static
     */
    public function startOfHour();

/**
     * Resets the date to the first day of the millennium and the time to 00:00:00
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->startOfMillennium();
     * ```
     *
     * @return static
     */
    public function startOfMillennium();

/**
     * Modify to start of current minute, seconds become 0
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->startOfMinute();
     * ```
     *
     * @return static
     */
    public function startOfMinute();

/**
     * Resets the date to the first day of the month and the time to 00:00:00
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->startOfMonth();
     * ```
     *
     * @return static
     */
    public function startOfMonth();

/**
     * Resets the date to the first day of the quarter and the time to 00:00:00
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->startOfQuarter();
     * ```
     *
     * @return static
     */
    public function startOfQuarter();

/**
     * Modify to start of current second, microseconds become 0
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16.334455')
     *   ->startOfSecond()
     *   ->format('H:i:s.u');
     * ```
     *
     * @return static
     */
    public function startOfSecond();

/**
     * Resets the date to the first day of week (defined in $weekStartsAt) and the time to 00:00:00
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->startOfWeek() . "\n";
     * echo Carbon::parse('2018-07-25 12:45:16')->locale('ar')->startOfWeek() . "\n";
     * echo Carbon::parse('2018-07-25 12:45:16')->startOfWeek(Carbon::SUNDAY) . "\n";
     * ```
     *
     * @param int $weekStartsAt optional start allow you to specify the day of week to use to start the week
     *
     * @return static
     */
    public function startOfWeek($weekStartsAt = null);

/**
     * Resets the date to the first day of the year and the time to 00:00:00
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16')->startOfYear();
     * ```
     *
     * @return static
     */
    public function startOfYear();

/**
     * Subtract given units or interval to the current instance.
     *
     * @example $date->sub('hour', 3)
     * @example $date->sub(15, 'days')
     * @example $date->sub(CarbonInterval::days(4))
     *
     * @param string|DateInterval|Closure|CarbonConverterInterface $unit
     * @param int                                                  $value
     * @param bool|null                                            $overflow
     *
     * @return static
     */
    public function sub($unit, $value = 1, $overflow = null);

public function subRealUnit($unit, $value = 1);

/**
     * Subtract given units to the current instance.
     *
     * @param string    $unit
     * @param int       $value
     * @param bool|null $overflow
     *
     * @return static
     */
    public function subUnit($unit, $value = 1, $overflow = null);

/**
     * Subtract any unit to a new value without overflowing current other unit given.
     *
     * @param string $valueUnit    unit name to modify
     * @param int    $value        amount to subtract to the input unit
     * @param string $overflowUnit unit name to not overflow
     *
     * @return static
     */
    public function subUnitNoOverflow($valueUnit, $value, $overflowUnit);

/**
     * Subtract given units or interval to the current instance.
     *
     * @see sub()
     *
     * @param string|DateInterval $unit
     * @param int                 $value
     * @param bool|null           $overflow
     *
     * @return static
     */
    public function subtract($unit, $value = 1, $overflow = null);

/**
     * Get the difference in a human readable format in the current locale from current instance to an other
     * instance given (or now if null given).
     *
     * @return string
     */
    public function timespan($other = null, $timezone = null);

/**
     * @alias setTimezone
     *
     * @param DateTimeZone|string $value
     *
     * @return static
     */
    public function timezone($value);

/**
     * Get the difference in a human readable format in the current locale from an other
     * instance given (or now if null given) to current instance.
     *
     * When comparing a value in the past to default now:
     * 1 hour from now
     * 5 months from now
     *
     * When comparing a value in the future to default now:
     * 1 hour ago
     * 5 months ago
     *
     * When comparing a value in the past to another value:
     * 1 hour after
     * 5 months after
     *
     * When comparing a value in the future to another value:
     * 1 hour before
     * 5 months before
     *
     * @param Carbon|\DateTimeInterface|string|array|null $other   if array passed, will be used as parameters array, see $syntax below;
     *                                                             if null passed, now will be used as comparison reference;
     *                                                             if any other type, it will be converted to date and used as reference.
     * @param int|array                                   $syntax  if array passed, parameters will be extracted from it, the array may contains:
     *                                                             - 'syntax' entry (see below)
     *                                                             - 'short' entry (see below)
     *                                                             - 'parts' entry (see below)
     *                                                             - 'options' entry (see below)
     *                                                             - 'join' entry determines how to join multiple parts of the string
     *                                                             `  - if $join is a string, it's used as a joiner glue
     *                                                             `  - if $join is a callable/closure, it get the list of string and should return a string
     *                                                             `  - if $join is an array, the first item will be the default glue, and the second item
     *                                                             `    will be used instead of the glue for the last item
     *                                                             `  - if $join is true, it will be guessed from the locale ('list' translation file entry)
     *                                                             `  - if $join is missing, a space will be used as glue
     *                                                             - 'other' entry (see above)
     *                                                             if int passed, it add modifiers:
     *                                                             Possible values:
     *                                                             - CarbonInterface::DIFF_ABSOLUTE          no modifiers
     *                                                             - CarbonInterface::DIFF_RELATIVE_TO_NOW   add ago/from now modifier
     *                                                             - CarbonInterface::DIFF_RELATIVE_TO_OTHER add before/after modifier
     *                                                             Default value: CarbonInterface::DIFF_ABSOLUTE
     * @param bool                                        $short   displays short format of time units
     * @param int                                         $parts   maximum number of parts to display (default value: 1: single unit)
     * @param int                                         $options human diff options
     *
     * @return string
     */
    public function to($other = null, $syntax = null, $short = false, $parts = 1, $options = null);

/**
     * Get default array representation.
     *
     * @example
     * ```
     * var_dump(Carbon::now()->toArray());
     * ```
     *
     * @return array
     */
    public function toArray();

/**
     * Format the instance as ATOM
     *
     * @example
     * ```
     * echo Carbon::now()->toAtomString();
     * ```
     *
     * @return string
     */
    public function toAtomString();

/**
     * Format the instance as COOKIE
     *
     * @example
     * ```
     * echo Carbon::now()->toCookieString();
     * ```
     *
     * @return string
     */
    public function toCookieString();

/**
     * @alias toDateTime
     *
     * Return native DateTime PHP object matching the current instance.
     *
     * @example
     * ```
     * var_dump(Carbon::now()->toDate());
     * ```
     *
     * @return DateTime
     */
    public function toDate();

/**
     * Format the instance as date
     *
     * @example
     * ```
     * echo Carbon::now()->toDateString();
     * ```
     *
     * @return string
     */
    public function toDateString();

/**
     * Return native DateTime PHP object matching the current instance.
     *
     * @example
     * ```
     * var_dump(Carbon::now()->toDateTime());
     * ```
     *
     * @return DateTime
     */
    public function toDateTime();

/**
     * Return native toDateTimeImmutable PHP object matching the current instance.
     *
     * @example
     * ```
     * var_dump(Carbon::now()->toDateTimeImmutable());
     * ```
     *
     * @return DateTimeImmutable
     */
    public function toDateTimeImmutable();

/**
     * Format the instance as date and time T-separated with no timezone
     *
     * @example
     * ```
     * echo Carbon::now()->toDateTimeLocalString();
     * echo "\n";
     * echo Carbon::now()->toDateTimeLocalString('minute'); // You can specify precision among: minute, second, millisecond and microsecond
     * ```
     *
     * @param string $unitPrecision
     *
     * @return string
     */
    public function toDateTimeLocalString($unitPrecision = 'second');

/**
     * Format the instance as date and time
     *
     * @example
     * ```
     * echo Carbon::now()->toDateTimeString();
     * ```
     *
     * @param string $unitPrecision
     *
     * @return string
     */
    public function toDateTimeString($unitPrecision = 'second');

/**
     * Format the instance with day, date and time
     *
     * @example
     * ```
     * echo Carbon::now()->toDayDateTimeString();
     * ```
     *
     * @return string
     */
    public function toDayDateTimeString();

/**
     * Format the instance as a readable date
     *
     * @example
     * ```
     * echo Carbon::now()->toFormattedDateString();
     * ```
     *
     * @return string
     */
    public function toFormattedDateString();

/**
     * Return the ISO-8601 string (ex: 1977-04-22T06:00:00Z, if $keepOffset truthy, offset will be kept:
     * 1977-04-22T01:00:00-05:00).
     *
     * @example
     * ```
     * echo Carbon::now('America/Toronto')->toISOString() . "\n";
     * echo Carbon::now('America/Toronto')->toISOString(true) . "\n";
     * ```
     *
     * @param bool $keepOffset Pass true to keep the date offset. Else forced to UTC.
     *
     * @return null|string
     */
    public function toISOString($keepOffset = false);

/**
     * Return a immutable copy of the instance.
     *
     * @return CarbonImmutable
     */
    public function toImmutable();

/**
     * Format the instance as ISO8601
     *
     * @example
     * ```
     * echo Carbon::now()->toIso8601String();
     * ```
     *
     * @return string
     */
    public function toIso8601String();

/**
     * Convert the instance to UTC and return as Zulu ISO8601
     *
     * @example
     * ```
     * echo Carbon::now()->toIso8601ZuluString();
     * ```
     *
     * @param string $unitPrecision
     *
     * @return string
     */
    public function toIso8601ZuluString($unitPrecision = 'second');

/**
     * Return the ISO-8601 string (ex: 1977-04-22T06:00:00Z) with UTC timezone.
     *
     * @example
     * ```
     * echo Carbon::now('America/Toronto')->toJSON();
     * ```
     *
     * @return null|string
     */
    public function toJSON();

/**
     * Return a mutable copy of the instance.
     *
     * @return Carbon
     */
    public function toMutable();

/**
     * Get the difference in a human readable format in the current locale from an other
     * instance given to now
     *
     * @param int|array $syntax  if array passed, parameters will be extracted from it, the array may contains:
     *                           - 'syntax' entry (see below)
     *                           - 'short' entry (see below)
     *                           - 'parts' entry (see below)
     *                           - 'options' entry (see below)
     *                           - 'join' entry determines how to join multiple parts of the string
     *                           `  - if $join is a string, it's used as a joiner glue
     *                           `  - if $join is a callable/closure, it get the list of string and should return a string
     *                           `  - if $join is an array, the first item will be the default glue, and the second item
     *                           `    will be used instead of the glue for the last item
     *                           `  - if $join is true, it will be guessed from the locale ('list' translation file entry)
     *                           `  - if $join is missing, a space will be used as glue
     *                           if int passed, it add modifiers:
     *                           Possible values:
     *                           - CarbonInterface::DIFF_ABSOLUTE          no modifiers
     *                           - CarbonInterface::DIFF_RELATIVE_TO_NOW   add ago/from now modifier
     *                           - CarbonInterface::DIFF_RELATIVE_TO_OTHER add before/after modifier
     *                           Default value: CarbonInterface::DIFF_ABSOLUTE
     * @param bool      $short   displays short format of time units
     * @param int       $parts   maximum number of parts to display (default value: 1: single part)
     * @param int       $options human diff options
     *
     * @return string
     */
    public function toNow($syntax = null, $short = false, $parts = 1, $options = null);

/**
     * Get default object representation.
     *
     * @example
     * ```
     * var_dump(Carbon::now()->toObject());
     * ```
     *
     * @return object
     */
    public function toObject();

/**
     * Create a iterable CarbonPeriod object from current date to a given end date (and optional interval).
     *
     * @param \DateTimeInterface|Carbon|CarbonImmutable|int|null $end      period end date or recurrences count if int
     * @param int|\DateInterval|string|null                      $interval period default interval or number of the given $unit
     * @param string|null                                        $unit     if specified, $interval must be an integer
     *
     * @return CarbonPeriod
     */
    public function toPeriod($end = null, $interval = null, $unit = null);

/**
     * Format the instance as RFC1036
     *
     * @example
     * ```
     * echo Carbon::now()->toRfc1036String();
     * ```
     *
     * @return string
     */
    public function toRfc1036String();

/**
     * Format the instance as RFC1123
     *
     * @example
     * ```
     * echo Carbon::now()->toRfc1123String();
     * ```
     *
     * @return string
     */
    public function toRfc1123String();

/**
     * Format the instance as RFC2822
     *
     * @example
     * ```
     * echo Carbon::now()->toRfc2822String();
     * ```
     *
     * @return string
     */
    public function toRfc2822String();

/**
     * Format the instance as RFC3339
     *
     * @param bool $extended
     *
     * @example
     * ```
     * echo Carbon::now()->toRfc3339String() . "\n";
     * echo Carbon::now()->toRfc3339String(true) . "\n";
     * ```
     *
     * @return string
     */
    public function toRfc3339String($extended = false);

/**
     * Format the instance as RFC7231
     *
     * @example
     * ```
     * echo Carbon::now()->toRfc7231String();
     * ```
     *
     * @return string
     */
    public function toRfc7231String();

/**
     * Format the instance as RFC822
     *
     * @example
     * ```
     * echo Carbon::now()->toRfc822String();
     * ```
     *
     * @return string
     */
    public function toRfc822String();

/**
     * Format the instance as RFC850
     *
     * @example
     * ```
     * echo Carbon::now()->toRfc850String();
     * ```
     *
     * @return string
     */
    public function toRfc850String();

/**
     * Format the instance as RSS
     *
     * @example
     * ```
     * echo Carbon::now()->toRssString();
     * ```
     *
     * @return string
     */
    public function toRssString();

/**
     * Returns english human readable complete date string.
     *
     * @example
     * ```
     * echo Carbon::now()->toString();
     * ```
     *
     * @return string
     */
    public function toString();

/**
     * Format the instance as time
     *
     * @example
     * ```
     * echo Carbon::now()->toTimeString();
     * ```
     *
     * @param string $unitPrecision
     *
     * @return string
     */
    public function toTimeString($unitPrecision = 'second');

/**
     * Format the instance as W3C
     *
     * @example
     * ```
     * echo Carbon::now()->toW3cString();
     * ```
     *
     * @return string
     */
    public function toW3cString();

/**
     * Create a Carbon instance for today.
     *
     * @param DateTimeZone|string|null $tz
     *
     * @return static
     */
    public static function today($tz = null);

/**
     * Create a Carbon instance for tomorrow.
     *
     * @param DateTimeZone|string|null $tz
     *
     * @return static
     */
    public static function tomorrow($tz = null);

/**
     * Translate using translation string or callback available.
     *
     * @param string                                             $key
     * @param array                                              $parameters
     * @param null                                               $number
     * @param \Symfony\Component\Translation\TranslatorInterface $translator
     *
     * @return string
     */
    public function translate(string $key, array $parameters = [], $number = null, \Symfony\Component\Translation\TranslatorInterface $translator = null, bool $altNumbers = false): string;

/**
     * Returns the alternative number for a given integer if available in the current locale.
     *
     * @param int $number
     *
     * @return string
     */
    public function translateNumber(int $number): string;

/**
     * Translate a time string from a locale to an other.
     *
     * @param string      $timeString date/time/duration string to translate (may also contain English)
     * @param string|null $from       input locale of the $timeString parameter (`Carbon::getLocale()` by default)
     * @param string|null $to         output locale of the result returned (`"en"` by default)
     * @param int         $mode       specify what to translate with options:
     *                                - self::TRANSLATE_ALL (default)
     *                                - CarbonInterface::TRANSLATE_MONTHS
     *                                - CarbonInterface::TRANSLATE_DAYS
     *                                - CarbonInterface::TRANSLATE_UNITS
     *                                - CarbonInterface::TRANSLATE_MERIDIEM
     *                                You can use pipe to group: CarbonInterface::TRANSLATE_MONTHS | CarbonInterface::TRANSLATE_DAYS
     *
     * @return string
     */
    public static function translateTimeString($timeString, $from = null, $to = null, $mode = self::TRANSLATE_ALL);

/**
     * Translate a time string from the current locale (`$date->locale()`) to an other.
     *
     * @param string      $timeString time string to translate
     * @param string|null $to         output locale of the result returned ("en" by default)
     *
     * @return string
     */
    public function translateTimeStringTo($timeString, $to = null);

/**
     * Translate using translation string or callback available.
     *
     * @param \Symfony\Component\Translation\TranslatorInterface $translator
     * @param string                                             $key
     * @param array                                              $parameters
     * @param null                                               $number
     *
     * @return string
     */
    public static function translateWith(\Symfony\Component\Translation\TranslatorInterface $translator, string $key, array $parameters = [], $number = null): string;

/**
     * Format as ->format() do (using date replacements patterns from http://php.net/manual/fr/function.date.php)
     * but translate words whenever possible (months, day names, etc.) using the current locale.
     *
     * @param string $format
     *
     * @return string
     */
    public function translatedFormat(string $format): string;

/**
     * Set the timezone or returns the timezone name if no arguments passed.
     *
     * @param DateTimeZone|string $value
     *
     * @return static|string
     */
    public function tz($value = null);

/**
     * @alias getTimestamp
     *
     * Returns the UNIX timestamp for the current date.
     *
     * @return int
     */
    public function unix();

/**
     * @alias to
     *
     * Get the difference in a human readable format in the current locale from an other
     * instance given (or now if null given) to current instance.
     *
     * @param Carbon|\DateTimeInterface|string|array|null $other   if array passed, will be used as parameters array, see $syntax below;
     *                                                             if null passed, now will be used as comparison reference;
     *                                                             if any other type, it will be converted to date and used as reference.
     * @param int|array                                   $syntax  if array passed, parameters will be extracted from it, the array may contains:
     *                                                             - 'syntax' entry (see below)
     *                                                             - 'short' entry (see below)
     *                                                             - 'parts' entry (see below)
     *                                                             - 'options' entry (see below)
     *                                                             - 'join' entry determines how to join multiple parts of the string
     *                                                             `  - if $join is a string, it's used as a joiner glue
     *                                                             `  - if $join is a callable/closure, it get the list of string and should return a string
     *                                                             `  - if $join is an array, the first item will be the default glue, and the second item
     *                                                             `    will be used instead of the glue for the last item
     *                                                             `  - if $join is true, it will be guessed from the locale ('list' translation file entry)
     *                                                             `  - if $join is missing, a space will be used as glue
     *                                                             - 'other' entry (see above)
     *                                                             if int passed, it add modifiers:
     *                                                             Possible values:
     *                                                             - CarbonInterface::DIFF_ABSOLUTE          no modifiers
     *                                                             - CarbonInterface::DIFF_RELATIVE_TO_NOW   add ago/from now modifier
     *                                                             - CarbonInterface::DIFF_RELATIVE_TO_OTHER add before/after modifier
     *                                                             Default value: CarbonInterface::DIFF_ABSOLUTE
     * @param bool                                        $short   displays short format of time units
     * @param int                                         $parts   maximum number of parts to display (default value: 1: single unit)
     * @param int                                         $options human diff options
     *
     * @return string
     */
    public function until($other = null, $syntax = null, $short = false, $parts = 1, $options = null);

/**
     * @deprecated To avoid conflict between different third-party libraries, static setters should not be used.
     *             You should rather use the ->settings() method.
     *             Or you can use method variants: addMonthsWithOverflow/addMonthsNoOverflow, same variants
     *             are available for quarters, years, decade, centuries, millennia (singular and plural forms).
     * @see settings
     *
     * Indicates if months should be calculated with overflow.
     *
     * @param bool $monthsOverflow
     *
     * @return void
     */
    public static function useMonthsOverflow($monthsOverflow = true);

/**
     * @deprecated To avoid conflict between different third-party libraries, static setters should not be used.
     *             You should rather use the ->settings() method.
     * @see settings
     *
     * Enable the strict mode (or disable with passing false).
     *
     * @param bool $strictModeEnabled
     */
    public static function useStrictMode($strictModeEnabled = true);

/**
     * @deprecated To avoid conflict between different third-party libraries, static setters should not be used.
     *             You should rather use the ->settings() method.
     *             Or you can use method variants: addYearsWithOverflow/addYearsNoOverflow, same variants
     *             are available for quarters, years, decade, centuries, millennia (singular and plural forms).
     * @see settings
     *
     * Indicates if years should be calculated with overflow.
     *
     * @param bool $yearsOverflow
     *
     * @return void
     */
    public static function useYearsOverflow($yearsOverflow = true);

/**
     * Set the instance's timezone to UTC.
     *
     * @return static
     */
    public function utc();

/**
     * Returns the minutes offset to UTC if no arguments passed, else set the timezone with given minutes shift passed.
     *
     * @param int|null $minuteOffset
     *
     * @return int|static
     */
    public function utcOffset(int $minuteOffset = null);

/**
     * Returns the milliseconds timestamps used amongst other by Date javascript objects.
     *
     * @return float
     */
    public function valueOf();

/**
     * Get/set the week number using given first day of week and first
     * day of year included in the first week. Or use US format if no settings
     * given (Sunday / Jan 6).
     *
     * @param int|null $week
     * @param int|null $dayOfWeek
     * @param int|null $dayOfYear
     *
     * @return int|static
     */
    public function week($week = null, $dayOfWeek = null, $dayOfYear = null);

/**
     * Set/get the week number of year using given first day of week and first
     * day of year included in the first week. Or use US format if no settings
     * given (Sunday / Jan 6).
     *
     * @param int|null $year      if null, act as a getter, if not null, set the year and return current instance.
     * @param int|null $dayOfWeek first date of week from 0 (Sunday) to 6 (Saturday)
     * @param int|null $dayOfYear first day of year included in the week #1
     *
     * @return int|static
     */
    public function weekYear($year = null, $dayOfWeek = null, $dayOfYear = null);

/**
     * Get/set the weekday from 0 (Sunday) to 6 (Saturday).
     *
     * @param int|null $value new value for weekday if using as setter.
     *
     * @return static|int
     */
    public function weekday($value = null);

/**
     * Get the number of weeks of the current week-year using given first day of week and first
     * day of year included in the first week. Or use US format if no settings
     * given (Sunday / Jan 6).
     *
     * @param int|null $dayOfWeek first date of week from 0 (Sunday) to 6 (Saturday)
     * @param int|null $dayOfYear first day of year included in the week #1
     *
     * @return int
     */
    public function weeksInYear($dayOfWeek = null, $dayOfYear = null);

/**
     * Temporarily sets a static date to be used within the callback.
     * Using setTestNow to set the date, executing the callback, then
     * clearing the test instance.
     *
     * /!\ Use this method for unit tests only.
     *
     * @param Closure|static|string|false|null $testNow real or mock Carbon instance
     * @param Closure|null $callback
     */
    public static function withTestNow($testNow = null, $callback = null);

/**
     * Create a Carbon instance for yesterday.
     *
     * @param DateTimeZone|string|null $tz
     *
     * @return static
     */
    public static function yesterday($tz = null);

// </methods>
}

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