.
     *
     * @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?)';

    /**
     * Default locale (language and region).
     *
     * @var string
     */
    public const DEFAULT_LOCALE = 'en';

    // <methods>

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

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

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

    /**
     * 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.
     *
     * @throws InvalidFormatException
     */
    public function __construct(DateTimeInterface|WeekDay|Month|string|int|float|null $time = null, DateTimeZone|string|int|null $timezone = null);

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

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

    /**
     * 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 $dump
     *
     * @return static
     */
    #[ReturnTypeWillChange]
    public static function __set_state($dump): static;

    /**
     * Returns the list of properties to dump on serialize() called on.
     *
     * Only used by PHP < 7.4.
     *
     * @return array
     */
    public function __sleep();

    /**
     * Format the instance as a string using the set format
     *
     * @example
     * ```
     * echo Carbon::now(); // Carbon instances can be cast to 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 Unit|string|DateInterval|Closure|CarbonConverterInterface $unit
     * @param int|float                                                 $value
     * @param bool|null                                                 $overflow
     *
     * @return static
     */
    #[ReturnTypeWillChange]
    public function add($unit, $value = 1, ?bool $overflow = null): static;

    /**
     * @deprecated Prefer to use add addUTCUnit() which more accurately defines what it's doing.
     *
     * Add seconds to the instance using timestamp. Positive $value travels
     * forward while negative $value travels into the past.
     *
     * @param string         $unit
     * @param int|float|null $value
     *
     * @return static
     */
    public function addRealUnit(string $unit, $value = 1): static;

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

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

    /**
     * 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
     */
    public function addUnitNoOverflow(string $valueUnit, int $value, string $overflowUnit): static;

    /**
     * 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);

    /**
     * Clone the current instance if it's mutable.
     *
     * This method is convenient to ensure you don't mutate the initial object
     * but avoid to make a useless copy of it if it's already immutable.
     *
     * @return static
     */
    public function avoidMutation(): static;

    /**
     * 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 bool $equal Indicates if an equal to comparison should be done
     */
    public function between(DateTimeInterface|string $date1, DateTimeInterface|string $date2, bool $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
     * ```
     */
    public function betweenExcluded(DateTimeInterface|string $date1, DateTimeInterface|string $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
     * ```
     */
    public function betweenIncluded(DateTimeInterface|string $date1, DateTimeInterface|string $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
     * ```
     */
    public static function canBeCreatedFromFormat(?string $date, string $format): bool;

    /**
     * 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.
     *
     * @template T
     *
     * @param class-string<T> $className The $className::instance() method will be called to cast the current object.
     *
     * @return T
     */
    public function cast(string $className): mixed;

    /**
     * Ceil the current instance second with given precision if specified.
     */
    public function ceil(DateInterval|string|int|float $precision = 1): static;

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

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

    /**
     * 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 DateTimeInterface|string|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|int|null      $timezone
     *
     * @throws InvalidFormatException
     *
     * @return static|null
     */
    public static function create($year = 0, $month = 1, $day = 1, $hour = 0, $minute = 0, $second = 0, $timezone = 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|int|null $timezone
     *
     * @throws InvalidFormatException
     *
     * @return static
     */
    public static function createFromDate($year = null, $month = null, $day = null, $timezone = null);

    /**
     * Create a Carbon instance from a specific format.
     *
     * @param string                       $format   Datetime format
     * @param string                       $time
     * @param DateTimeZone|string|int|null $timezone
     *
     * @throws InvalidFormatException
     *
     * @return static|null
     */
    #[ReturnTypeWillChange]
    public static function createFromFormat($format, $time, $timezone = 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|int|null $timezone   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 TranslatorInterface|null     $translator optional custom translator to use for macro-formats
     *
     * @throws InvalidFormatException
     *
     * @return static|null
     */
    public static function createFromIsoFormat(string $format, string $time, $timezone = null, ?string $locale = 'en', ?TranslatorInterface $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|int|null $timezone
     *
     * @throws InvalidFormatException
     *
     * @return static|null
     */
    public static function createFromLocaleFormat(string $format, string $locale, string $time, $timezone = 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|int|null $timezone
     *
     * @throws InvalidFormatException
     *
     * @return static|null
     */
    public static function createFromLocaleIsoFormat(string $format, string $locale, string $time, $timezone = 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|int|null $timezone
     *
     * @throws InvalidFormatException
     *
     * @return static
     */
    public static function createFromTime($hour = 0, $minute = 0, $second = 0, $timezone = null): static;

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

    /**
     * Create a Carbon instance from a timestamp and set the timezone (UTC by default).
     *
     * Timestamp input can be given as int, float or a string containing one or more numbers.
     */
    public static function createFromTimestamp(string|int|float $timestamp, DateTimeZone|string|int|null $timezone = null): static;

    /**
     * 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.
     */
    public static function createFromTimestampMs(string|int|float $timestamp, DateTimeZone|string|int|null $timezone = null): static;

    /**
     * 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): static;

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

    /**
     * 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|int|null $timezone
     *
     * @throws InvalidFormatException
     *
     * @return static
     */
    public static function createMidnightDate($year = null, $month = null, $day = null, $timezone = 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|int|null $timezone
     *
     * @throws InvalidDateException
     *
     * @return static|null
     */
    public static function createSafe($year = null, $month = null, $day = null, $hour = null, $minute = null, $second = null, $timezone = null);

    /**
     * Create a new Carbon instance from a specific date and time using strict validation.
     *
     * @see create()
     *
     * @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|int|null $timezone
     *
     * @throws InvalidFormatException
     *
     * @return static
     */
    public static function createStrict(?int $year = 0, ?int $month = 1, ?int $day = 1, ?int $hour = 0, ?int $minute = 0, ?int $second = 0, $timezone = null): static;

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

    /**
     * Get the difference as a CarbonInterval instance.
     * Return relative interval (negative if $absolute flag is not set to true and the given date is before
     * current one).
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return CarbonInterval
     */
    public function diffAsCarbonInterval($date = null, bool $absolute = false, array $skip = []): CarbonInterval;

    /**
     * Get the difference as a DateInterval instance.
     * Return relative interval (negative if $absolute flag is not set to true and the given date is before
     * current one).
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     *
     * @return DateInterval
     */
    public function diffAsDateInterval($date = null, bool $absolute = false): DateInterval;

    /**
     * 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, bool $absolute = false): int;

    /**
     * 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)
     *                                                            ⦿ 'skip' entry, list of units to skip (array of strings or a single string,
     *                                                            ` it can be the unit name (singular or plural) or its shortcut
     *                                                            ` (y, m, w, d, h, min, s, ms, µs).
     *                                                            ⦿ 'aUnit' entry, prefer "an hour" over "1 hour" if true
     *                                                            ⦿ 'altNumbers' entry, use alternative numbers if available
     *                                                            ` (from the current language if true is passed, from the given language(s)
     *                                                            ` if array or string is passed)
     *                                                            ⦿ '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)
     *                                                            ⦿ 'minimumUnit' entry determines the smallest unit of time to display can be long or
     *                                                            `  short form of the units, e.g. 'hour' or 'h' (default value: s)
     *                                                            ⦿ 'locale' language in which the diff should be output (has no effect if 'translator' key is set)
     *                                                            ⦿ 'translator' a custom translator to use to translator the output.
     *                                                            if int passed, it adds 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                                        $options human diff options
     */
    public function diffForHumans($other = null, $syntax = null, $short = false, $parts = 1, $options = null): string;

    /**
     * Get the difference in days.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     * @param bool                                                   $utc      Always convert dates to UTC before comparing (if not set, it will do it only if timezones are different)
     *
     * @return float
     */
    public function diffInDays($date = null, bool $absolute = false, bool $utc = false): float;

    /**
     * Get the difference in days using a filter closure.
     *
     * @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, bool $absolute = false): int;

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

    /**
     * Get the difference in hours using a filter closure.
     *
     * @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, bool $absolute = false): int;

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

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

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

    /**
     * Get the difference in months.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     * @param bool                                                   $utc      Always convert dates to UTC before comparing (if not set, it will do it only if timezones are different)
     *
     * @return float
     */
    public function diffInMonths($date = null, bool $absolute = false, bool $utc = false): float;

    /**
     * Get the difference in quarters.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     * @param bool                                                   $utc      Always convert dates to UTC before comparing (if not set, it will do it only if timezones are different)
     *
     * @return float
     */
    public function diffInQuarters($date = null, bool $absolute = false, bool $utc = false): float;

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

    /**
     * @param Unit|string                                            $unit     microsecond, millisecond, second, minute,
     *                                                                         hour, day, week, month, quarter, year,
     *                                                                         century, millennium
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     * @param bool                                                   $utc      Always convert dates to UTC before comparing (if not set, it will do it only if timezones are different)
     *
     * @return float
     */
    public function diffInUnit(Unit|string $unit, $date = null, bool $absolute = false, bool $utc = false): float;

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

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

    /**
     * Get the difference in weeks.
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     * @param bool                                                   $utc      Always convert dates to UTC before comparing (if not set, it will do it only if timezones are different)
     *
     * @return float
     */
    public function diffInWeeks($date = null, bool $absolute = false, bool $utc = false): float;

    /**
     * Get the difference in years
     *
     * @param \Carbon\CarbonInterface|\DateTimeInterface|string|null $date
     * @param bool                                                   $absolute Get the absolute of the difference
     * @param bool                                                   $utc      Always convert dates to UTC before comparing (if not set, it will do it only if timezones are different)
     *
     * @return float
     */
    public function diffInYears($date = null, bool $absolute = false, bool $utc = false): float;

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

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

    /**
     * Modify to end of current given unit.
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16.334455')
     *   ->startOf(Unit::Month)
     *   ->endOf(Unit::Week, Carbon::FRIDAY);
     * ```
     */
    public function endOf(Unit|string $unit, mixed ...$params): static;

    /**
     * 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();
     * ```
     */
    public function endOfHour(): static;

    /**
     * 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 millisecond, microseconds such as 12345 become 123999
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16.334455')
     *   ->endOfSecond()
     *   ->format('H:i:s.u');
     * ```
     */
    public function endOfMillisecond(): static;

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

    /**
     * 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');
     * ```
     */
    public function endOfSecond(): static;

    /**
     * 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 WeekDay|int|null $weekEndsAt optional end allow you to specify the day of week to use to end the week
     *
     * @return static
     */
    public function endOfWeek(WeekDay|int|null $weekEndsAt = null): static;

    /**
     * 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
     * ```
     *
     * @see equalTo()
     */
    public function eq(DateTimeInterface|string $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
     * ```
     */
    public function equalTo(DateTimeInterface|string $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(string $locale, callable $func): mixed;

    /**
     * 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);

    /**
     * Round the current instance second with given precision if specified.
     */
    public function floor(DateInterval|string|int|float $precision = 1): static;

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

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

    /**
     * @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): static;

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

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

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

    public function getClock(): ?WrapperClock;

    /**
     * Get the days of the week.
     */
    public static function getDays(): array;

    /**
     * Return the number of days since the start of the week (using the current locale or the first parameter
     * if explicitly given).
     *
     * @param WeekDay|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.)
     */
    public function getDaysFromStartOfWeek(WeekDay|int|null $weekStartsAt = null): int;

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

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

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

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

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

    /**
     * {@inheritdoc}
     */
    public static function getLastErrors(): array|false;

    /**
     * Get the raw callable macro registered globally or locally for a given name.
     */
    public function getLocalMacro(string $name): ?callable;

    /**
     * Get the translator of the current instance or the default if none set.
     */
    public function getLocalTranslator(): TranslatorInterface;

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

    /**
     * Get the raw callable macro registered globally for a given name.
     */
    public static function getMacro(string $name): ?callable;

    /**
     * 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)
     */
    public function getOffsetString(string $separator = ':'): string;

    /**
     * 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    $padType   Side(s) to pad (STR_PAD_LEFT by default)
     */
    public function getPaddedUnit($unit, $length = 2, $padString = '0', $padType = 0): string;

    /**
     * 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): float;

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

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

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

    /**
     * Returns the timestamp with millisecond precision.
     *
     * @return int
     */
    public function getTimestampMs(): int;

    /**
     * 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
     */
    public function getTranslatedDayName(?string $context = null, string $keySuffix = '', ?string $defaultValue = null): string;

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

    /**
     * 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
     */
    public function getTranslatedMonthName(?string $context = null, string $keySuffix = '', ?string $defaultValue = null): string;

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

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

    /**
     * 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 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 TranslatorInterface|null $translator the translator to use
     * @param string                   $key        key to find
     * @param string|null              $locale     current locale used if null
     * @param string|null              $default    default value if translation returns the key
     *
     * @return string|Closure|null
     */
    public static function getTranslationMessageWith($translator, string $key, ?string $locale = null, ?string $default = null);

    /**
     * Initialize the default translator instance if necessary.
     */
    public static function getTranslator(): TranslatorInterface;

    /**
     * Get the last day of week.
     *
     * @param string $locale local to consider the last day of week.
     *
     * @return int
     */
    public static function getWeekEndsAt(?string $locale = null): int;

    /**
     * Get the first day of week.
     *
     * @return int
     */
    public static function getWeekStartsAt(?string $locale = null): int;

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

    /**
     * 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
     * ```
     */
    public function greaterThan(DateTimeInterface|string $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
     * ```
     */
    public function greaterThanOrEqualTo(DateTimeInterface|string $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
     * ```
     *
     * @see greaterThan()
     */
    public function gt(DateTimeInterface|string $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
     * ```
     *
     * @see greaterThanOrEqualTo()
     */
    public function gte(DateTimeInterface|string $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
     * ```
     */
    public static function hasFormat(string $date, string $format): bool;

    /**
     * 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(?string $date, string $format): bool;

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

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

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

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

    /**
     * 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(): bool;

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

    /**
     * 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
     */
    public function is(WeekDay|Month|string $tester): bool;

    /**
     * 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
     * ```
     *
     * @see greaterThan()
     */
    public function isAfter(DateTimeInterface|string $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
     * ```
     *
     * @see lessThan()
     */
    public function isBefore(DateTimeInterface|string $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 bool $equal Indicates if an equal to comparison should be done
     */
    public function isBetween(DateTimeInterface|string $date1, DateTimeInterface|string $date2, bool $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 DateTimeInterface|string|null $date The instance to compare with or null to use current day.
     *
     * @return bool
     */
    public function isBirthday(DateTimeInterface|string|null $date = null): bool;

    /**
     * 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
     */
    public function isCurrentUnit(string $unit): bool;

    /**
     * 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|string $dayOfWeek
     *
     * @return bool
     */
    public function isDayOfWeek($dayOfWeek): bool;

    /**
     * Determines if the instance is end of century (last day by default but interval can be customized).
     */
    public function isEndOfCentury(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * 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
     * @param Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval          if an interval is specified it will be used as precision
     *                                                                                          for instance with "15 minutes", it checks if current date-time
     *                                                                                          is in the last 15 minutes of the day, with Unit::Hour, it
     *                                                                                          checks if it's in the last hour of the day.
     */
    public function isEndOfDay(Unit|DateInterval|Closure|CarbonConverterInterface|string|bool $checkMicroseconds = false, Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * Determines if the instance is end of decade (last day by default but interval can be customized).
     */
    public function isEndOfDecade(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * Determines if the instance is end of hour (last microsecond by default but interval can be customized).
     */
    public function isEndOfHour(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * Determines if the instance is end of millennium (last day by default but interval can be customized).
     */
    public function isEndOfMillennium(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * Determines if the instance is end of millisecond (last microsecond by default but interval can be customized).
     */
    public function isEndOfMillisecond(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * Determines if the instance is end of minute (last microsecond by default but interval can be customized).
     */
    public function isEndOfMinute(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * Determines if the instance is end of month (last day by default but interval can be customized).
     */
    public function isEndOfMonth(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * Determines if the instance is end of quarter (last day by default but interval can be customized).
     */
    public function isEndOfQuarter(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * Determines if the instance is end of second (last microsecond by default but interval can be customized).
     */
    public function isEndOfSecond(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * Returns true if the date was created using CarbonImmutable::endOfTime()
     *
     * @return bool
     */
    public function isEndOfTime(): bool;

    /**
     * Check if the instance is end of a given unit (tolerating a given interval).
     *
     * @example
     * ```
     * // Check if a date-time is the last 15 minutes of the hour it's in
     * Carbon::parse('2019-02-28 20:13:00')->isEndOfUnit(Unit::Hour, '15 minutes'); // false
     * ```
     */
    public function isEndOfUnit(Unit $unit, Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null, mixed ...$params): bool;

    /**
     * Determines if the instance is end of week (last day by default but interval can be customized).
     *
     * @example
     * ```
     * Carbon::parse('2024-08-31')->endOfWeek()->isEndOfWeek(); // true
     * Carbon::parse('2024-08-31')->isEndOfWeek(); // false
     * ```
     */
    public function isEndOfWeek(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null, WeekDay|int|null $weekEndsAt = null): bool;

    /**
     * Determines if the instance is end of year (last day by default but interval can be customized).
     */
    public function isEndOfYear(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * 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
     * ```
     */
    public function isFuture(): bool;

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

    /**
     * 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
     * ```
     */
    public function isLastOfMonth(): bool;

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

    /**
     * Determines if the instance is a long year (using ISO 8601 year).
     *
     * @example
     * ```
     * Carbon::parse('2015-01-01')->isLongIsoYear(); // true
     * Carbon::parse('2016-01-01')->isLongIsoYear(); // true
     * Carbon::parse('2016-01-03')->isLongIsoYear(); // false
     * Carbon::parse('2019-12-29')->isLongIsoYear(); // false
     * Carbon::parse('2019-12-30')->isLongIsoYear(); // true
     * ```
     *
     * @see https://en.wikipedia.org/wiki/ISO_8601#Week_dates
     */
    public function isLongIsoYear(): bool;

    /**
     * Determines if the instance is a long year (using calendar year).
     *
     * ⚠️ This method completely ignores month and day to use the numeric year number,
     * it's not correct if the exact date matters. For instance as `2019-12-30` is already
     * in the first week of the 2020 year, if you want to know from this date if ISO week
     * year 2020 is a long year, use `isLongIsoYear` instead.
     *
     * @example
     * ```
     * Carbon::create(2015)->isLongYear(); // true
     * Carbon::create(2016)->isLongYear(); // false
     * ```
     *
     * @see https://en.wikipedia.org/wiki/ISO_8601#Week_dates
     */
    public function isLongYear(): bool;

    /**
     * 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
     * ```
     */
    public function isMidday(): bool;

    /**
     * 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
     * ```
     */
    public function isMidnight(): bool;

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

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

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

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

    /**
     * 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
     * ```
     */
    public function isPast(): bool;

    /**
     * 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 DateTimeInterface|string $date   instance to compare with or null to use current day.
     */
    public function isSameAs(string $format, DateTimeInterface|string $date): bool;

    /**
     * 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 DateTimeInterface|string $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(DateTimeInterface|string $date, bool $ofSameYear = true): bool;

    /**
     * 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 DateTimeInterface|string $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(DateTimeInterface|string $date, bool $ofSameYear = true): bool;

    /**
     * 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 DateTimeInterface|string $date instance to compare with or null to use current day.
     *
     * @throws BadComparisonUnitException
     *
     * @return bool
     */
    public function isSameUnit(string $unit, DateTimeInterface|string $date): bool;

    /**
     * Determines if the instance is start of century (first day by default but interval can be customized).
     */
    public function isStartOfCentury(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * 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
     * @param Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval          if an interval is specified it will be used as precision
     *                                                                                          for instance with "15 minutes", it checks if current date-time
     *                                                                                          is in the last 15 minutes of the day, with Unit::Hour, it
     *                                                                                          checks if it's in the last hour of the day.
     */
    public function isStartOfDay(Unit|DateInterval|Closure|CarbonConverterInterface|string|bool $checkMicroseconds = false, Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * Determines if the instance is start of decade (first day by default but interval can be customized).
     */
    public function isStartOfDecade(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * Determines if the instance is start of hour (first microsecond by default but interval can be customized).
     */
    public function isStartOfHour(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * Determines if the instance is start of millennium (first day by default but interval can be customized).
     */
    public function isStartOfMillennium(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * Determines if the instance is start of millisecond (first microsecond by default but interval can be customized).
     */
    public function isStartOfMillisecond(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * Determines if the instance is start of minute (first microsecond by default but interval can be customized).
     */
    public function isStartOfMinute(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * Determines if the instance is start of month (first day by default but interval can be customized).
     */
    public function isStartOfMonth(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * Determines if the instance is start of quarter (first day by default but interval can be customized).
     */
    public function isStartOfQuarter(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * Determines if the instance is start of second (first microsecond by default but interval can be customized).
     */
    public function isStartOfSecond(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * Returns true if the date was created using CarbonImmutable::startOfTime()
     *
     * @return bool
     */
    public function isStartOfTime(): bool;

    /**
     * Check if the instance is start of a given unit (tolerating a given interval).
     *
     * @example
     * ```
     * // Check if a date-time is the first 15 minutes of the hour it's in
     * Carbon::parse('2019-02-28 20:13:00')->isStartOfUnit(Unit::Hour, '15 minutes'); // true
     * ```
     */
    public function isStartOfUnit(Unit $unit, Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null, mixed ...$params): bool;

    /**
     * Determines if the instance is start of week (first day by default but interval can be customized).
     *
     * @example
     * ```
     * Carbon::parse('2024-08-31')->startOfWeek()->isStartOfWeek(); // true
     * Carbon::parse('2024-08-31')->isStartOfWeek(); // false
     * ```
     */
    public function isStartOfWeek(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null, WeekDay|int|null $weekStartsAt = null): bool;

    /**
     * Determines if the instance is start of year (first day by default but interval can be customized).
     */
    public function isStartOfYear(Unit|DateInterval|Closure|CarbonConverterInterface|string|null $interval = null): bool;

    /**
     * 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(): bool;

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

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

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

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

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

    /**
     * Format in the current language using ISO replacement patterns.
     *
     * @param string|null $originalFormat provide context if a chunk has been passed alone
     */
    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 WeekDay|int|null $value new value for weekday if using as setter.
     */
    public function isoWeekday(WeekDay|int|null $value = null): static|int;

    /**
     * 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.
     */
    public function jsonSerialize(): mixed;

    /**
     * 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
     * ```
     */
    public function lessThan(DateTimeInterface|string $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
     * ```
     */
    public function lessThanOrEqualTo(DateTimeInterface|string $date): bool;

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

    /**
     * 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(string $locale): bool;

    /**
     * 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(string $locale): bool;

    /**
     * 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(string $locale): bool;

    /**
     * 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(string $locale): bool;

    /**
     * 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
     * ```
     *
     * @see lessThan()
     */
    public function lt(DateTimeInterface|string $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
     * ```
     *
     * @see lessThanOrEqualTo()
     */
    public function lte(DateTimeInterface|string $date): bool;

    /**
     * Register a custom macro.
     *
     * Pass null macro to remove it.
     *
     * @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-closure-this  static  $macro
     */
    public static function macro(string $name, ?callable $macro): void;

    /**
     * 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, DateTimeZone|string|null $timezone = null);

    /**
     * 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);

    /**
     * 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.
     */
    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);

    /**
     * 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";
     * ```
     *
     * @throws ReflectionException
     */
    public static function mixin(object|string $mixin): void;

    /**
     * Calls \DateTime::modify if mutable or \DateTimeImmutable::modify else.
     *
     * @see https://php.net/manual/en/datetime.modify.php
     *
     * @return static
     */
    #[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
     * ```
     *
     * @see notEqualTo()
     */
    public function ne(DateTimeInterface|string $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
     * ```
     */
    public function notEqualTo(DateTimeInterface|string $date): bool;

    /**
     * Get a Carbon instance for the current date and time.
     */
    public static function now(DateTimeZone|string|int|null $timezone = null): static;

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

    /**
     * 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.
     */
    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().
     *
     * @throws InvalidFormatException
     */
    public static function parse(DateTimeInterface|WeekDay|Month|string|int|float|null $time, DateTimeZone|string|int|null $timezone = null): static;

    /**
     * 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|int|null $timezone optional timezone for the new instance.
     *
     * @throws InvalidFormatException
     */
    public static function parseFromLocale(string $time, ?string $locale = null, DateTimeZone|string|int|null $timezone = null): static;

    /**
     * Returns standardized plural of a given singular/plural unit name (in English).
     */
    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, $interval must be an integer
     */
    public function range($end = null, $interval = null, $unit = null): CarbonPeriod;

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

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

    /**
     * @see https://php.net/manual/en/datetime.format.php
     */
    public function rawFormat(string $format): 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().
     *
     * @throws InvalidFormatException
     */
    public static function rawParse(DateTimeInterface|WeekDay|Month|string|int|float|null $time, DateTimeZone|string|int|null $timezone = null): static;

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

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

    /**
     * @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(): void;

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

    /**
     * @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(): void;

    /**
     * Round the current instance second with given precision if specified.
     */
    public function round(DateInterval|string|int|float $precision = 1, callable|string $function = 'round'): static;

    /**
     * Round the current instance at the given unit with given precision if specified and the given function.
     */
    public function roundUnit(string $unit, DateInterval|string|int|float $precision = 1, callable|string $function = 'round'): static;

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

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

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

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

    /**
     * @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.
     */
    public static function serializeUsing(callable|string|null $format): void;

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

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

    /**
     * Set the year, month, and date for this instance to that of the passed instance.
     */
    public function setDateFrom(DateTimeInterface|string $date): static;

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

    /**
     * Set the date and time for this instance to that of the passed instance.
     */
    public function setDateTimeFrom(DateTimeInterface|string $date): static;

    /**
     * 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 WeekDay|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.)
     */
    public function setDaysFromStartOfWeek(int $numberOfDays, WeekDay|int|null $weekStartsAt = null): static;

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

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

    /**
     * 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
     */
    public function setISODate(int $year, int $week, int $day = 1): static;

    /**
     * Set the translator for the current instance.
     */
    public function setLocalTranslator(TranslatorInterface $translator);

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

    /**
     * @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(mixed $testNow = null): void;

    /**
     * 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, $timezone = null): void;

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

    /**
     * Set the hour, minute, second and microseconds for this instance to that of the passed instance.
     */
    public function setTimeFrom(DateTimeInterface|string $date): static;

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

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

    /**
     * Set the instance's timezone from a string or object.
     */
    public function setTimezone(DateTimeZone|string|int $timeZone): static;

    /**
     * @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(Closure|string|null $format): void;

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

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

    /**
     * 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
     */
    public function setUnitNoOverflow(string $valueUnit, int $value, string $overflowUnit): static;

    /**
     * @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
     */
    public static function setWeekendDays(array $days): void;

    /**
     * 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): static;

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

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

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

    /**
     * @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).
     */
    public static function singularUnit(string $unit): string;

    public static function sleep(int|float $seconds): void;

    /**
     * Modify to start of current given unit.
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16.334455')
     *   ->startOf(Unit::Month)
     *   ->endOf(Unit::Week, Carbon::FRIDAY);
     * ```
     */
    public function startOf(Unit|string $unit, mixed ...$params): static;

    /**
     * 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();
     * ```
     */
    public function startOfHour(): static;

    /**
     * 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 millisecond, microseconds such as 12345 become 123000
     *
     * @example
     * ```
     * echo Carbon::parse('2018-07-25 12:45:16.334455')
     *   ->startOfSecond()
     *   ->format('H:i:s.u');
     * ```
     */
    public function startOfMillisecond(): static;

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

    /**
     * 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');
     * ```
     */
    public function startOfSecond(): static;

    /**
     * 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 WeekDay|int|null $weekStartsAt optional start allow you to specify the day of week to use to start the week
     *
     * @return static
     */
    public function startOfWeek(WeekDay|int|null $weekStartsAt = null): static;

    /**
     * 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 Unit|string|DateInterval|Closure|CarbonConverterInterface $unit
     * @param int|float                                                 $value
     * @param bool|null                                                 $overflow
     *
     * @return static
     */
    #[ReturnTypeWillChange]
    public function sub($unit, $value = 1, ?bool $overflow = null): static;

    /**
     * @deprecated Prefer to use add subUTCUnit() which more accurately defines what it's doing.
     *
     * Subtract seconds to the instance using timestamp. Positive $value travels
     * into the past while negative $value travels forward.
     *
     * @param string $unit
     * @param int    $value
     *
     * @return static
     */
    public function subRealUnit($unit, $value = 1): static;

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

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

    /**
     * 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
     */
    public function subUnitNoOverflow(string $valueUnit, int $value, string $overflowUnit): static;

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

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

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

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

    /**
     * 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());
     * ```
     */
    public function toArray(): array;

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

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

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

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

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

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

    /**
     * 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
     * ```
     */
    public function toDateTimeLocalString(string $unitPrecision = 'second'): string;

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

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

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

    /**
     * Format the instance with the day, and a readable date
     *
     * @example
     * ```
     * echo Carbon::now()->toFormattedDayDateString();
     * ```
     */
    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.
     */
    public function toISOString(bool $keepOffset = false): ?string;

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

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

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

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

    /**
     * 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());
     * ```
     */
    public function toObject(): object;

    /**
     * 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, $interval must be an integer
     */
    public function toPeriod($end = null, $interval = null, $unit = null): CarbonPeriod;

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

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

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

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

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

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

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

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

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

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

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

    /**
     * Create a Carbon instance for today.
     */
    public static function today(DateTimeZone|string|int|null $timezone = null): static;

    /**
     * Create a Carbon instance for tomorrow.
     */
    public static function tomorrow(DateTimeZone|string|int|null $timezone = null): static;

    /**
     * Translate using translation string or callback available.
     *
     * @param string                   $key        key to find
     * @param array                    $parameters replacement parameters
     * @param string|int|float|null    $number     number if plural
     * @param TranslatorInterface|null $translator an optional translator to use
     * @param bool                     $altNumbers pass true to use alternative numbers
     *
     * @return string
     */
    public function translate(string $key, array $parameters = [], string|int|float|null $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(string $timeString, ?string $from = null, ?string $to = null, int $mode = self::TRANSLATE_ALL): string;

    /**
     * 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(string $timeString, ?string $to = null): string;

    /**
     * Translate using translation string or callback available.
     *
     * @param TranslatorInterface $translator an optional translator to use
     * @param string              $key        key to find
     * @param array               $parameters replacement parameters
     * @param int|float|null      $number     number if plural
     *
     * @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.
     */
    public function translatedFormat(string $format): string;

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

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

    /**
     * @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(bool $monthsOverflow = true): void;

    /**
     * @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(bool $strictModeEnabled = true): void;

    /**
     * @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(bool $yearsOverflow = true): void;

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

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

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

    /**
     * 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 WeekDay|int|null $value new value for weekday if using as setter.
     */
    public function weekday(WeekDay|int|null $value = null): static|int;

    /**
     * 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(mixed $testNow, callable $callback): mixed;

    /**
     * Create a Carbon instance for yesterday.
     */
    public static function yesterday(DateTimeZone|string|int|null $timezone = null): static;

    // </methods>
}
<br />
<b>Fatal error</b>:  Uncaught Error: Interface &quot;Carbon\CarbonInterface&quot; not found in /home/systemkol/source/vendor/nesbot/carbon/src/Carbon/Carbon.php:836
Stack trace:
#0 /home/systemkol/source/vendor/composer/ClassLoader.php(576): include()
#1 /home/systemkol/source/vendor/composer/ClassLoader.php(427): Composer\Autoload\{closure}('/home/systemkol...')
#2 /home/systemkol/source/vendor/laravel/framework/src/Illuminate/Support/Carbon.php(12): Composer\Autoload\ClassLoader-&gt;loadClass('Carbon\\Carbon')
#3 /home/systemkol/source/vendor/composer/ClassLoader.php(576): include('/home/systemkol...')
#4 /home/systemkol/source/vendor/composer/ClassLoader.php(427): Composer\Autoload\{closure}('/home/systemkol...')
#5 /home/systemkol/source/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(140): Composer\Autoload\ClassLoader-&gt;loadClass('Illuminate\\Supp...')
#6 /home/systemkol/public_html/index.php(59): Illuminate\Foundation\Http\Kernel-&gt;handle(Object(Illuminate\Http\Request))
#7 {main}
  thrown in <b>/home/systemkol/source/vendor/nesbot/carbon/src/Carbon/Carbon.php</b> on line <b>836</b><br />