$date
 *
 * @return bool
 */
 public function lessThan($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
 *
 * @return static|false
 */
 #[\ReturnTypeWillChange]
 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 $modifier
 *
 * @return static|false
 */
 public function next($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 $modifier
 *
 * @return static|false
 */
 public function previous($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);
 /**
 * Create a Carbon instance from a specific format.
 *
 * @param string $format Datetime format
 * @param string $time
 * @param DateTimeZone|string|false|null $tz
 *
 * @throws InvalidFormatException
 *
 * @return static|false
 */
 public static function rawCreateFromFormat($format, $time, $tz = null);
 /**
 * @see https://php.net/manual/en/datetime.format.php
 *
 * @param string $format
 *
 * @return string
 */
 public function rawFormat($format);
 /**
 * 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 $tz
 *
 * @throws InvalidFormatException
 *
 * @return static
 */
 public static function rawParse($time = null, $tz = null);
 /**
 * 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 $day
 *
 * @return static
 */
 #[\ReturnTypeWillChange]
 public function setDate($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 day (keeping the current time) to the start of the week + the number of days passed as the first
 * parameter. First day of week is driven by the locale unless explicitly set with the second parameter.
 *
 * @param int $numberOfDays number of days to add after the start of the current week
 * @param int|null $weekStartsAt optional start allow you to specify the day of week to use to start the week,
 * if not provided, start of week is inferred from the locale
 * (Sunday for en_US, Monday for de_DE, etc.)
 *
 * @return static
 */
 public function setDaysFromStartOfWeek(int $numberOfDays, ?int $weekStartsAt = 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 $day
 *
 * @return static
 */
 #[\ReturnTypeWillChange]
 public function setISODate($year, $week, $day = 1);
 /**
 * Set the translator for the current instance.
 *
 * @param \Symfony\Component\Translation\TranslatorInterface $translator
 *
 * @return $this
 */
 public function setLocalTranslator(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.
 *
 * Only the moment is mocked with setTestNow(), the timezone will still be the one passed
 * as parameter of date_default_timezone_get() as a fallback (see setTestNowAndTimezone()).
 *
 * To clear the test instance call this method using the default
 * parameter of null.
 *
 * /!\ Use this method for unit tests only.
 *
 * @param DateTimeInterface|Closure|static|string|false|null $testNow real or mock Carbon instance
 */
 public static function setTestNow($testNow = null);
 /**
 * 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().
 *
 * It will also align default timezone (e.g. call date_default_timezone_set()) with
 * the second argument or if null, with the timezone of the given date object.
 *
 * To clear the test instance call this method using the default
 * parameter of null.
 *
 * /!\ Use this method for unit tests only.
 *
 * @param DateTimeInterface|Closure|static|string|false|null $testNow real or mock Carbon instance
 */
 public static function setTestNowAndTimezone($testNow = null, $tz = 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 $microseconds
 *
 * @return static
 */
 #[\ReturnTypeWillChange]
 public function setTime($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 $unixTimestamp
 *
 * @return static
 */
 #[\ReturnTypeWillChange]
 public function setTimestamp($unixTimestamp);
 /**
 * Set the instance's timezone from a string or object.
 *
 * @param DateTimeZone|string $value
 *
 * @return static
 */
 #[\ReturnTypeWillChange]
 public function setTimezone($value);
 /**
 * @deprecated To avoid conflict between different third-party libraries, static setters should not be used.
 * You should rather let Carbon object being cast to string with DEFAULT_TO_STRING_FORMAT, and
 * use other method or custom format passed to format() method if you need to dump another 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(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 $overflow
 *
 * @return static
 */
 #[\ReturnTypeWillChange]
 public function sub($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);
 /**
 * 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 $unixTimestamp
 *
 * @return static
 */
 public function timestamp($unixTimestamp);
 /**
 * @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();
 /**
 * Format the instance with the day, and a readable date
 *
 * @example
 * ```
 * echo Carbon::now()->toFormattedDayDateString();
 * ```
 *
 * @return string
 */
 public function toFormattedDayDateString() : string;
 /**
 * 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 string|int|float|null $number
 * @param \Symfony\Component\Translation\TranslatorInterface|null $translator
 * @param bool $altNumbers
 *
 * @return string
 */
 public function translate(string $key, array $parameters = [], $number = null, ?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(TranslatorInterface $translator, string $key, array $parameters = [], $number = null) : string;
 /**
 * Format as ->format() do (using date replacements patterns from https://php.net/manual/en/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.
 *
 * @template T
 *
 * @param DateTimeInterface|Closure|static|string|false|null $testNow real or mock Carbon instance
 * @param Closure(): T $callback
 *
 * @return T
 */
 public static function withTestNow($testNow, $callback);
 /**
 * Create a Carbon instance for yesterday.
 *
 * @param DateTimeZone|string|null $tz
 *
 * @return static
 */
 public static function yesterday($tz = null);
 // </methods>
}