<?php

namespace Carbon;

use Carbon\Exceptions\InvalidDateException;
use Closure;
use DateInterval;
use DatePeriod;
use DateTime;
use DateTimeInterface;
use DateTimeZone;
use InvalidArgumentException;
use JsonSerializable;
use Symfony\Component\Translation\TranslatorInterface;

/**
 * A simple API extension for DateTime
 *
 * @property      int $year
 * @property      int $yearIso
 * @property      int $month
 * @property      int $day
 * @property      int $hour
 * @property      int $minute
 * @property      int $second
 * @property      int $timestamp seconds since the Unix Epoch
 * @property      \DateTimeZone $timezone the current timezone
 * @property      \DateTimeZone $tz alias of timezone
 * @property-read int $micro
 * @property-read int $dayOfWeek 0 (for Sunday) through 6 (for Saturday)
 * @property-read int $dayOfWeekIso 1 (for Monday) through 7 (for Sunday)
 * @property-read int $dayOfYear 0 through 365
 * @property-read int $weekOfMonth 1 through 5
 * @property-read int $weekNumberInMonth 1 through 5
 * @property-read int $weekOfYear ISO-8601 week number of year, weeks starting on Monday
 * @property-read int $daysInMonth number of days in the given month
 * @property-read int $age does a diffInYears() with default parameters
 * @property-read int $quarter the quarter of this instance, 1 - 4
 * @property-read int $offset the timezone offset in seconds from UTC
 * @property-read int $offsetHours the timezone offset in hours from UTC
 * @property-read bool $dst daylight savings time indicator, true if DST, false otherwise
 * @property-read bool $local checks if the timezone is local, true if local, false otherwise
 * @property-read bool $utc checks if the timezone is UTC, true if UTC, false otherwise
 * @property-read string $timezoneName
 * @property-read string $tzName
 * @property-read string $englishDayOfWeek the day of week in English
 * @property-read string $shortEnglishDayOfWeek the abbreviated day of week in English
 * @property-read string $englishMonth the day of week in English
 * @property-read string $shortEnglishMonth the abbreviated day of week in English
 * @property-read string $localeDayOfWeek the day of week in current locale LC_TIME
 * @property-read string $shortLocaleDayOfWeek the abbreviated day of week in current locale LC_TIME
 * @property-read string $localeMonth the month in current locale LC_TIME
 * @property-read string $shortLocaleMonth the abbreviated month in current locale LC_TIME
 */
class Carbon extends DateTime implements JsonSerializable
{
	const NO_ZERO_DIFF = 01;
	const JUST_NOW = 02;
	const ONE_DAY_WORDS = 04;
	const TWO_DAY_WORDS = 010;
	const DIFF_RELATIVE_TO_NOW = 'relative-to-now';
	const DIFF_RELATIVE_TO_OTHER = 'relative-to-other';

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

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

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

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

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

	/**
	 * Names of days of the week.
	 *
	 * @var array
	 */
	protected static $days = array(
	    self::SUNDAY => 'Sunday',
	    self::MONDAY => 'Monday',
	    self::TUESDAY => 'Tuesday',
	    self::WEDNESDAY => 'Wednesday',
	    self::THURSDAY => 'Thursday',
	    self::FRIDAY => 'Friday',
	    self::SATURDAY => 'Saturday',
	);

	/**
	 * Customizable PHP_INT_SIZE override.
	 *
	 * @var int
	 */
	public static $PHPIntSize = PHP_INT_SIZE;

	/**
	 * Format to use for __toString method when type juggling occurs.
	 *
	 * @var string
	 */
	protected static $toStringFormat = self::DEFAULT_TO_STRING_FORMAT;

	/**
	 * First day of week.
	 *
	 * @var int
	 */
	protected static $weekStartsAt = self::MONDAY;

	/**
	 * Last day of week.
	 *
	 * @var int
	 */
	protected static $weekEndsAt = self::SUNDAY;

	/**
	 * Days of weekend.
	 *
	 * @var array
	 */
	protected static $weekendDays = array(
	    self::SATURDAY,
	    self::SUNDAY,
	);

	/**
	 * Midday/noon hour.
	 *
	 * @var int
	 */
	protected static $midDayAt = 12;

	/**
	 * Format regex patterns.
	 *
	 * @var array
	 */
	protected static $regexFormats = array(
	    'd' => '(3[01]|[12][0-9]|0[1-9])',
	    'D' => '([a-zA-Z]{3})',
	    'j' => '([123][0-9]|[1-9])',
	    'l' => '([a-zA-Z]{2,})',
	    'N' => '([1-7])',
	    'S' => '([a-zA-Z]{2})',
	    'w' => '([0-6])',
	    'z' => '(36[0-5]|3[0-5][0-9]|[12][0-9]{2}|[1-9]?[0-9])',
	    'W' => '(5[012]|[1-4][0-9]|[1-9])',
	    'F' => '([a-zA-Z]{2,})',
	    'm' => '(1[012]|0[1-9])',
	    'M' => '([a-zA-Z]{3})',
	    'n' => '(1[012]|[1-9])',
	    't' => '(2[89]|3[01])',
	    'L' => '(0|1)',
	    'o' => '([1-9][0-9]{0,4})',
	    'Y' => '([1-9]?[0-9]{4})',
	    'y' => '([0-9]{2})',
	    'a' => '(am|pm)',
	    'A' => '(AM|PM)',
	    'B' => '([0-9]{3})',
	    'g' => '(1[012]|[1-9])',
	    'G' => '(2[0-3]|1?[0-9])',
	    'h' => '(1[012]|0[1-9])',
	    'H' => '(2[0-3]|[01][0-9])',
	    'i' => '([0-5][0-9])',
	    's' => '([0-5][0-9])',
	    'u' => '([0-9]{1,6})',
	    'v' => '([0-9]{1,3})',
	    'e' => '([a-zA-Z]{1,5})|([a-zA-Z]*\/[a-zA-Z]*)',
	    'I' => '(0|1)',
	    'O' => '([\+\-](1[012]|0[0-9])[0134][05])',
	    'P' => '([\+\-](1[012]|0[0-9]):[0134][05])',
	    'T' => '([a-zA-Z]{1,5})',
	    'Z' => '(-?[1-5]?[0-9]{1,4})',
	    'U' => '([0-9]*)',

	    // The formats below are combinations of the above formats.
	    'c' => '(([1-9]?[0-9]{4})\-(1[012]|0[1-9])\-(3[01]|[12][0-9]|0[1-9])T(2[0-3]|[01][0-9]):([0-5][0-9]):([0-5][0-9])[\+\-](1[012]|0[0-9]):([0134][05]))', // Y-m-dTH:i:sP
	    'r' => '(([a-zA-Z]{3}), ([123][0-9]|[1-9]) ([a-zA-Z]{3}) ([1-9]?[0-9]{4}) (2[0-3]|[01][0-9]):([0-5][0-9]):([0-5][0-9]) [\+\-](1[012]|0[0-9])([0134][05]))', // D, j M Y H:i:s O
	);

	/**
	 * A test Carbon instance to be returned when now instances are created.
	 *
	 * @var \Carbon\Carbon
	 */
	protected static $testNow;

	/**
	 * A translator to ... er ... translate stuff.
	 *
	 * @var \Symfony\Component\Translation\TranslatorInterface
	 */
	protected static $translator;

	/**
	 * The errors that can occur.
	 *
	 * @var array
	 */
	protected static $lastErrors;

	/**
	 * The custom Carbon JSON serializer.
	 *
	 * @var callable|null
	 */
	protected static $serializer;

	/**
	 * The registered string macros.
	 *
	 * @var array
	 */
	protected static $localMacros = array();

	/**
	 * Will UTF8 encoding be used to print localized date/time ?
	 *
	 * @var bool
	 */
	protected static $utf8 = false;

	/**
	 * Add microseconds to now on PHP < 7.1 and 7.1.3. true by default.
	 *
	 * @var bool
	 */
	protected static $microsecondsFallback = true;

	/**
	 * Indicates if months should be calculated with overflow.
	 *
	 * @var bool
	 */
	protected static $monthsOverflow = true;

	/**
	 * Indicates if years should be calculated with overflow.
	 *
	 * @var bool
	 */
	protected static $yearsOverflow = true;

	/**
	 * Indicates if years are compared with month by default so isSameMonth and isSameQuarter have $ofSameYear set
	 * to true by default.
	 *
	 * @var bool
	 */
	protected static $compareYearWithMonth = false;

	/**
	 * Options for diffForHumans().
	 *
	 * @var int
	 */
	protected static $humanDiffOptions = self::NO_ZERO_DIFF;


	/**
	 * @param int $humanDiffOptions
	 */
	public static function setHumanDiffOptions($humanDiffOptions)
	{
		static::$humanDiffOptions = $humanDiffOptions;
	}


	/**
	 * @param int $humanDiffOption
	 */
	public static function enableHumanDiffOption($humanDiffOption)
	{
		static::$humanDiffOptions = static::getHumanDiffOptions() | $humanDiffOption;
	}


	/**
	 * @param int $humanDiffOption
	 */
	public static function disableHumanDiffOption($humanDiffOption)
	{
		static::$humanDiffOptions = static::getHumanDiffOptions() & ~$humanDiffOption;
	}


	/**
	 * @return int
	 */
	public static function getHumanDiffOptions()
	{
		return static::$humanDiffOptions;
	}


	/**
	 * Add microseconds to now on PHP < 7.1 and 7.1.3 if set to true,
	 * let microseconds to 0 on those PHP versions if false.
	 *
	 * @param bool $microsecondsFallback
	 */
	public static function useMicrosecondsFallback($microsecondsFallback = true)
	{
		static::$microsecondsFallback = $microsecondsFallback;
	}


	/**
	 * Return true if microseconds fallback on PHP < 7.1 and 7.1.3 is
	 * enabled. false if disabled.
	 *
	 * @return bool
	 */
	public static function isMicrosecondsFallbackEnabled()
	{
		return static::$microsecondsFallback;
	}


	/**
	 * Indicates if months should be calculated with overflow.
	 *
	 * @param bool $monthsOverflow
	 *
	 * @return void
	 */
	public static function useMonthsOverflow($monthsOverflow = true)
	{
		static::$monthsOverflow = $monthsOverflow;
	}


	/**
	 * Reset the month overflow behavior.
	 *
	 * @return void
	 */
	public static function resetMonthsOverflow()
	{
		static::$monthsOverflow = true;
	}


	/**
	 * Get the month overflow behavior.
	 *
	 * @return bool
	 */
	public static function shouldOverflowMonths()
	{
		return static::$monthsOverflow;
	}


	/**
	 * Indicates if years should be calculated with overflow.
	 *
	 * @param bool $yearsOverflow
	 *
	 * @return void
	 */
	public static function useYearsOverflow($yearsOverflow = true)
	{
		static::$yearsOverflow = $yearsOverflow;
	}


	/**
	 * Reset the month overflow behavior.
	 *
	 * @return void
	 */
	public static function resetYearsOverflow()
	{
		static::$yearsOverflow = true;
	}


	/**
	 * Get the month overflow behavior.
	 *
	 * @return bool
	 */
	public static function shouldOverflowYears()
	{
		return static::$yearsOverflow;
	}


	/**
	 * Get the month comparison default behavior.
	 *
	 * @return bool
	 */
	public static function compareYearWithMonth($compareYearWithMonth = true)
	{
		static::$compareYearWithMonth = $compareYearWithMonth;
	}


	/**
	 * Get the month comparison default behavior.
	 *
	 * @return bool
	 */
	public static function shouldCompareYearWithMonth()
	{
		return static::$compareYearWithMonth;
	}


	/**
	 * Creates a DateTimeZone from a string, DateTimeZone or integer offset.
	 *
	 * @param \DateTimeZone|string|int|null $object
	 *
	 * @throws \InvalidArgumentException
	 *
	 * @return \DateTimeZone
	 */
	protected static function safeCreateDateTimeZone($object)
	{
		if ($object === null) {
		    // Don't return null... avoid Bug #52063 in PHP <5.3.6
		    return new DateTimeZone(date_default_timezone_get());
		}

		if ($object instanceof DateTimeZone) {
		    return $object;
		}

		if (is_numeric($object)) {
		    $tzName = timezone_name_from_abbr(null, $object * 3600, true);

		    if ($tzName === false) {
		        throw new InvalidArgumentException('Unknown or bad timezone ('.$object.')');
		    }

		    $object = $tzName;
		}

		$tz = @timezone_open($object = (string) $object);

		if ($tz !== false) {
		    return $tz;
		}

		// Work-around for a bug fixed in PHP 5.5.10 https://bugs.php.net/bug.php?id=45528
		// See: https://stackoverflow.com/q/14068594/2646927
		// @codeCoverageIgnoreStart
		if (strpos($object, ':') !== false) {
		    try {
		        return static::createFromFormat('O', $object)->getTimezone();
		    } catch (InvalidArgumentException $e) {
		        //
		    }
		}
		// @codeCoverageIgnoreEnd

		throw new InvalidArgumentException('Unknown or bad timezone ('.$object.')');
	}


	/**
	 * Create a new Carbon instance.
	 *
	 * Please see the testing aids section (specifically static::setTestNow())
	 * for more on the possibility of this constructor returning a test instance.
	 *
	 * @param string|null               $time
	 * @param \DateTimeZone|string|null $tz
	 */
	public function __construct($time = null, $tz = null)
	{
		$isNow = empty($time) || $time === 'now';
		if (static::hasTestNow() && ($isNow || static::hasRelativeKeywords($time))) {
		    $testInstance = clone static::getTestNow();

		    //shift the time according to the given time zone
		    if ($tz !== null && $tz !== static::getTestNow()->getTimezone()) {
		        $testInstance->setTimezone($tz);
		    } else {
		        $tz = $testInstance->getTimezone();
		    }

		    if (static::hasRelativeKeywords($time)) {
		        $testInstance->modify($time);
		    }

		    $time = $testInstance->format(static::MOCK_DATETIME_FORMAT);
		}

		$timezone = static::safeCreateDateTimeZone($tz);
		// @codeCoverageIgnoreStart
		if ($isNow && !isset($testInstance) && static::isMicrosecondsFallbackEnabled() && (
		        version_compare(PHP_VERSION, '7.1.0-dev', '<')
		        ||
		        version_compare(PHP_VERSION, '7.1.3-dev', '>=') && version_compare(PHP_VERSION, '7.1.4-dev', '<')
		    )
		) {
		    // Get microseconds from microtime() if "now" asked and PHP < 7.1 and PHP 7.1.3 if fallback enabled.
		    list($microTime, $timeStamp) = explode(' ', microtime());
		    $dateTime = new DateTime('now', $timezone);
		    $dateTime->setTimestamp($timeStamp); // Use the timestamp returned by microtime as now can happen in the next second
		    $time = $dateTime->format(static::DEFAULT_TO_STRING_FORMAT).substr($microTime, 1, 7);
		}
		// @codeCoverageIgnoreEnd

		// Work-around for PHP bug https://bugs.php.net/bug.php?id=67127
		if (strpos((string) .1, '.') === false) {
		    $locale = setlocale(LC_NUMERIC, '0');
		    setlocale(LC_NUMERIC, 'C');
		}
		parent::__construct($time, $timezone);
		if (isset($locale)) {
		    setlocale(LC_NUMERIC, $locale);
		}
		static::setLastErrors(parent::getLastErrors());
	}


	/**
	 * Create a Carbon instance from a DateTime one.
	 *
	 * @param \DateTime|\DateTimeInterface $date
	 *
	 * @return static
	 */
	public static function instance($date)
	{
		if ($date instanceof static) {
		    return clone $date;
		}

		static::expectDateTime($date);

		return new static($date->format('Y-m-d H:i:s.u'), $date->getTimezone());
	}


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


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


	/**
	 * Create a Carbon instance for today.
	 *
	 * @param \DateTimeZone|string|null $tz
	 *
	 * @return static
	 */
	public static function today($tz = null)
	{
		return static::parse('today', $tz);
	}


	/**
	 * Create a Carbon instance for tomorrow.
	 *
	 * @param \DateTimeZone|string|null $tz
	 *
	 * @return static
	 */
	public static function tomorrow($tz = null)
	{
		return static::parse('tomorrow', $tz);
	}


	/**
	 * Create a Carbon instance for yesterday.
	 *
	 * @param \DateTimeZone|string|null $tz
	 *
	 * @return static
	 */
	public static function yesterday($tz = null)
	{
		return static::parse('yesterday', $tz);
	}


	/**
	 * Create a Carbon instance for the greatest supported date.
	 *
	 * @return static
	 */
	public static function maxValue()
	{
		if (self::$PHPIntSize === 4) {
		    // 32 bit
		    return static::createFromTimestamp(PHP_INT_MAX); // @codeCoverageIgnore
		}

		// 64 bit
		return static::create(9999, 12, 31, 23, 59, 59);
	}


	/**
	 * Create a Carbon instance for the lowest supported date.
	 *
	 * @return static
	 */
	public static function minValue()
	{
		if (self::$PHPIntSize === 4) {
		    // 32 bit
		    return static::createFromTimestamp(~PHP_INT_MAX); // @codeCoverageIgnore
		}

		// 64 bit
		return static::create(1, 1, 1, 0, 0, 0);
	}


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

		$defaults = array_combine(array(
		    'year',
		    'month',
		    'day',
		    'hour',
		    'minute',
		    'second',
		), explode('-', $now->format('Y-n-j-G-i-s')));

		$year = $year === null ? $defaults['year'] : $year;
		$month = $month === null ? $defaults['month'] : $month;
		$day = $day === null ? $defaults['day'] : $day;

		if ($hour === null) {
		    $hour = $defaults['hour'];
		    $minute = $minute === null ? $defaults['minute'] : $minute;
		    $second = $second === null ? $defaults['second'] : $second;
		} else {
		    $minute = $minute === null ? 0 : $minute;
		    $second = $second === null ? 0 : $second;
		}

		$fixYear = null;

		if ($year < 0) {
		    $fixYear = $year;
		    $year = 0;
		} elseif ($year > 9999) {
		    $fixYear = $year - 9999;
		    $year = 9999;
		}

		$instance = static::createFromFormat('!Y-n-j G:i:s', sprintf('%s-%s-%s %s:%02s:%02s', $year, $month, $day, $hour, $minute, $second), $tz);

		if ($fixYear !== null) {
		    $instance->addYears($fixYear);
		}

		return $instance;
	}


	/**
	 * 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 \InvalidArgumentException
	 * will be thrown.
	 *
	 * @param int|null                  $year
	 * @param int|null                  $month
	 * @param int|null                  $day
	 * @param int|null                  $hour
	 * @param int|null                  $minute
	 * @param int|null                  $second
	 * @param \DateTimeZone|string|null $tz
	 *
	 * @throws \Carbon\Exceptions\InvalidDateException|\InvalidArgumentException
	 *
	 * @return static
	 */
	public static function createSafe(
		$year = null,
		$month = null,
		$day = null,
		$hour = null,
		$minute = null,
		$second = null,
		$tz = null,
	) {
		$fields = array(
		    'year' => array(0, 9999),
		    'month' => array(0, 12),
		    'day' => array(0, 31),
		    'hour' => array(0, 24),
		    'minute' => array(0, 59),
		    'second' => array(0, 59),
		);

		foreach ($fields as $field => $range) {
		    if ($$field !== null && (!is_int($$field) || $$field < $range[0] || $$field > $range[1])) {
		        throw new InvalidDateException($field, $$field);
		    }
		}

		$instance = static::create($year, $month, $day, $hour, $minute, $second, $tz);

		foreach (array_reverse($fields) as $field => $range) {
		    if ($$field !== null && (!is_int($$field) || $$field !== $instance->$field)) {
		        throw new InvalidDateException($field, $$field);
		    }
		}

		return $instance;
	}


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


	/**
	 * Create a Carbon instance from just a date. The time portion is set to midnight.
	 *
	 * @param int|null                  $year
	 * @param int|null                  $month
	 * @param int|null                  $day
	 * @param \DateTimeZone|string|null $tz
	 *
	 * @return static
	 */
	public static function createMidnightDate($year = null, $month = null, $day = null, $tz = null)
	{
		return static::create($year, $month, $day, 0, 0, 0, $tz);
	}


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


	/**
	 * Create a Carbon instance from a time string. The date portion is set to today.
	 *
	 * @param string                    $time
	 * @param \DateTimeZone|string|null $tz
	 *
	 * @throws \InvalidArgumentException
	 *
	 * @return static
	 */
	public static function createFromTimeString($time, $tz = null)
	{
		return static::today($tz)->setTimeFromTimeString($time);
	}


	private static function createFromFormatAndTimezone($format, $time, $tz)
	{
		return $tz !== null
		    ? parent::createFromFormat($format, $time, static::safeCreateDateTimeZone($tz))
		    : parent::createFromFormat($format, $time);
	}


	/**
	 * Create a Carbon instance from a specific format.
	 *
	 * @param string                    $format Datetime format
	 * @param string                    $time
	 * @param \DateTimeZone|string|null $tz
	 *
	 * @throws InvalidArgumentException
	 *
	 * @return static
	 */
	public static function createFromFormat($format, $time, $tz = null)
	{
		$date = self::createFromFormatAndTimezone($format, $time, $tz);
		$lastErrors = parent::getLastErrors();

		if (($mock = static::getTestNow()) && ($date instanceof DateTime || $date instanceof DateTimeInterface)) {
		    // Set timezone from mock if custom timezone was neither given directly nor as a part of format.
		    // First let's skip the part that will be ignored by the parser.
		    $nonEscaped = '(?<!\\\\)(\\\\{2})*';

		    $nonIgnored = preg_replace("/^.*{$nonEscaped}!/s", '', $format);

		    if ($tz === null && !preg_match("/{$nonEscaped}[eOPT]/", $nonIgnored)) {
		        $tz = $mock->getTimezone();
		    }

		    // Prepend mock datetime only if the format does not contain non escaped unix epoch reset flag.
		    if (!preg_match("/{$nonEscaped}[!|]/", $format)) {
		        $format = static::MOCK_DATETIME_FORMAT.' '.$format;
		        $time = $mock->format(static::MOCK_DATETIME_FORMAT).' '.$time;
		    }

		    // Regenerate date from the modified format to base result on the mocked instance instead of now.
		    $date = self::createFromFormatAndTimezone($format, $time, $tz);
		}

		if ($date instanceof DateTime || $date instanceof DateTimeInterface) {
		    $instance = static::instance($date);
		    $instance::setLastErrors($lastErrors);

		    return $instance;
		}

		throw new InvalidArgumentException(implode(PHP_EOL, $lastErrors['errors']));
	}


	/**
	 * Set last errors.
	 *
	 * @param array $lastErrors
	 *
	 * @return void
	 */
	private static function setLastErrors(array $lastErrors)
	{
		static::$lastErrors = $lastErrors;
	}


	/**
	 * {@inheritdoc}
	 */
	public static function getLastErrors()
	{
		return static::$lastErrors;
	}


	/**
	 * Create a Carbon instance from a timestamp.
	 *
	 * @param int                       $timestamp
	 * @param \DateTimeZone|string|null $tz
	 *
	 * @return static
	 */
	public static function createFromTimestamp($timestamp, $tz = null)
	{
		return static::today($tz)->setTimestamp($timestamp);
	}


	/**
	 * Create a Carbon instance from a timestamp in milliseconds.
	 *
	 * @param int                       $timestamp
	 * @param \DateTimeZone|string|null $tz
	 *
	 * @return static
	 */
	public static function createFromTimestampMs($timestamp, $tz = null)
	{
		return static::createFromFormat('U.u', sprintf('%F', $timestamp / 1000))
		    ->setTimezone($tz);
	}


	/**
	 * Create a Carbon instance from an UTC timestamp.
	 *
	 * @param int $timestamp
	 *
	 * @return static
	 */
	public static function createFromTimestampUTC($timestamp)
	{
		return new static('@'.$timestamp);
	}


	/**
	 * 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 $var
	 *
	 * @return static|null
	 */
	public static function make($var)
	{
		if ($var instanceof DateTime || $var instanceof DateTimeInterface) {
		    return static::instance($var);
		}

		if (is_string($var)) {
		    $var = trim($var);
		    $first = substr($var, 0, 1);

		    if (is_string($var) && $first !== 'P' && $first !== 'R' && preg_match('/[a-z0-9]/i', $var)) {
		        return static::parse($var);
		    }
		}
	}


	/**
	 * Get a copy of the instance.
	 *
	 * @return static
	 */
	public function copy()
	{
		return clone $this;
	}


	/**
	 * Returns a present instance in the same timezone.
	 *
	 * @return static
	 */
	public function nowWithSameTz()
	{
		return static::now($this->getTimezone());
	}


	/**
	 * Throws an exception if the given object is not a DateTime and does not implement DateTimeInterface
	 * and not in $other.
	 *
	 * @param mixed        $date
	 * @param string|array $other
	 *
	 * @throws \InvalidArgumentException
	 */
	protected static function expectDateTime($date, $other = array())
	{
		$message = 'Expected ';
		foreach ((array) $other as $expect) {
		    $message .= "{$expect}, ";
		}

		if (!$date instanceof DateTime && !$date instanceof DateTimeInterface) {
		    throw new InvalidArgumentException(
		        $message.'DateTime or DateTimeInterface, '.
		        (is_object($date) ? get_class($date) : gettype($date)).' given'
		    );
		}
	}


	/**
	 * 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|\DateTimeInterface|string|null $date
	 *
	 * @return static
	 */
	protected function resolveCarbon($date = null)
	{
		if (!$date) {
		    return $this->nowWithSameTz();
		}

		if (is_string($date)) {
		    return static::parse($date, $this->getTimezone());
		}

		static::expectDateTime($date, array('null', 'string'));

		return $date instanceof self ? $date : static::instance($date);
	}


	/**
	 * Get a part of the Carbon object
	 *
	 * @param string $name
	 *
	 * @throws \InvalidArgumentException
	 *
	 * @return string|int|bool|\DateTimeZone
	 */
	public function __get($name)
	{
		static $formats = array(
		    'year' => 'Y',
		    'yearIso' => 'o',
		    'month' => 'n',
		    'day' => 'j',
		    'hour' => 'G',
		    'minute' => 'i',
		    'second' => 's',
		    'micro' => 'u',
		    'dayOfWeek' => 'w',
		    'dayOfWeekIso' => 'N',
		    'dayOfYear' => 'z',
		    'weekOfYear' => 'W',
		    'daysInMonth' => 't',
		    'timestamp' => 'U',
		    'englishDayOfWeek' => 'l',
		    'shortEnglishDayOfWeek' => 'D',
		    'englishMonth' => 'F',
		    'shortEnglishMonth' => 'M',
		    'localeDayOfWeek' => '%A',
		    'shortLocaleDayOfWeek' => '%a',
		    'localeMonth' => '%B',
		    'shortLocaleMonth' => '%b',
		);

		switch (true) {
		    case isset($formats[$name]):
		        $format = $formats[$name];
		        $method = substr($format, 0, 1) === '%' ? 'formatLocalized' : 'format';
		        $value = $this->$method($format);

		        return is_numeric($value) ? (int) $value : $value;

		    case $name === 'weekOfMonth':
		        return (int) ceil($this->day / static::DAYS_PER_WEEK);

		    case $name === 'weekNumberInMonth':
		        return (int) ceil(($this->day + $this->copy()->startOfMonth()->dayOfWeek - 1) / static::DAYS_PER_WEEK);

		    case $name === 'age':
		        return $this->diffInYears();

		    case $name === 'quarter':
		        return (int) ceil($this->month / static::MONTHS_PER_QUARTER);

		    case $name === 'offset':
		        return $this->getOffset();

		    case $name === 'offsetHours':
		        return $this->getOffset() / static::SECONDS_PER_MINUTE / static::MINUTES_PER_HOUR;

		    case $name === 'dst':
		        return $this->format('I') === '1';

		    case $name === 'local':
		        return $this->getOffset() === $this->copy()->setTimezone(date_default_timezone_get())->getOffset();

		    case $name === 'utc':
		        return $this->getOffset() === 0;

		    case $name === 'timezone' || $name === 'tz':
		        return $this->getTimezone();

		    case $name === 'timezoneName' || $name === 'tzName':
		        return $this->getTimezone()->getName();

		    default:
		        throw new InvalidArgumentException(sprintf("Unknown getter '%s'", $name));
		}
	}


	/**
	 * Check if an attribute exists on the object
	 *
	 * @param string $name
	 *
	 * @return bool
	 */
	public function __isset($name)
	{
		try {
		    $this->__get($name);
		} catch (InvalidArgumentException $e) {
		    return false;
		}

		return true;
	}


	/**
	 * Set a part of the Carbon object
	 *
	 * @param string                   $name
	 * @param string|int|\DateTimeZone $value
	 *
	 * @throws \InvalidArgumentException
	 *
	 * @return void
	 */
	public function __set($name, $value)
	{
		switch ($name) {
		    case 'year':
		    case 'month':
		    case 'day':
		    case 'hour':
		    case 'minute':
		    case 'second':
		        list($year, $month, $day, $hour, $minute, $second) = explode('-', $this->format('Y-n-j-G-i-s'));
		        $$name = $value;
		        $this->setDateTime($year, $month, $day, $hour, $minute, $second);
		        break;

		    case 'timestamp':
		        parent::setTimestamp($value);
		        break;

		    case 'timezone':
		    case 'tz':
		        $this->setTimezone($value);
		        break;

		    default:
		        throw new InvalidArgumentException(sprintf("Unknown setter '%s'", $name));
		}
	}


	/**
	 * Set the instance's year
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function year($value)
	{
		$this->year = $value;

		return $this;
	}


	/**
	 * Set the instance's month
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function month($value)
	{
		$this->month = $value;

		return $this;
	}


	/**
	 * Set the instance's day
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function day($value)
	{
		$this->day = $value;

		return $this;
	}


	/**
	 * Set the instance's hour
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function hour($value)
	{
		$this->hour = $value;

		return $this;
	}


	/**
	 * Set the instance's minute
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function minute($value)
	{
		$this->minute = $value;

		return $this;
	}


	/**
	 * Set the instance's second
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function second($value)
	{
		$this->second = $value;

		return $this;
	}


	/**
	 * Sets the current date of the DateTime object to a different date.
	 * Calls modify as a workaround for a php bug
	 *
	 * @param int $year
	 * @param int $month
	 * @param int $day
	 *
	 * @return static
	 *
	 * @see https://github.com/briannesbitt/Carbon/issues/539
	 * @see https://bugs.php.net/bug.php?id=63863
	 */
	public function setDate($year, $month, $day)
	{
		$this->modify('+0 day');

		return parent::setDate($year, $month, $day);
	}


	/**
	 * Set the date and time all together
	 *
	 * @param int $year
	 * @param int $month
	 * @param int $day
	 * @param int $hour
	 * @param int $minute
	 * @param int $second
	 *
	 * @return static
	 */
	public function setDateTime($year, $month, $day, $hour, $minute, $second = 0)
	{
		return $this->setDate($year, $month, $day)->setTime($hour, $minute, $second);
	}


	/**
	 * Set the time by time string
	 *
	 * @param string $time
	 *
	 * @return static
	 */
	public function setTimeFromTimeString($time)
	{
		if (strpos($time, ':') === false) {
		    $time .= ':0';
		}

		return $this->modify($time);
	}


	/**
	 * Set the instance's timestamp
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function timestamp($value)
	{
		return $this->setTimestamp($value);
	}


	/**
	 * Alias for setTimezone()
	 *
	 * @param \DateTimeZone|string $value
	 *
	 * @return static
	 */
	public function timezone($value)
	{
		return $this->setTimezone($value);
	}


	/**
	 * Alias for setTimezone()
	 *
	 * @param \DateTimeZone|string $value
	 *
	 * @return static
	 */
	public function tz($value)
	{
		return $this->setTimezone($value);
	}


	/**
	 * Set the instance's timezone from a string or object
	 *
	 * @param \DateTimeZone|string $value
	 *
	 * @return static
	 */
	public function setTimezone($value)
	{
		parent::setTimezone(static::safeCreateDateTimeZone($value));
		// https://bugs.php.net/bug.php?id=72338
		// just workaround on this bug
		$this->getTimestamp();

		return $this;
	}


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

		$this->setDate($date->year, $date->month, $date->day);

		return $this;
	}


	/**
	 * Set the hour, day, and time for this instance to that of the passed instance.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface $date
	 *
	 * @return static
	 */
	public function setTimeFrom($date)
	{
		$date = static::instance($date);

		$this->setTime($date->hour, $date->minute, $date->second);

		return $this;
	}


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


	/**
	 * Get the first day of week
	 *
	 * @return int
	 */
	public static function getWeekStartsAt()
	{
		return static::$weekStartsAt;
	}


	/**
	 * Set the first day of week
	 *
	 * @param int $day week start day
	 *
	 * @throws InvalidArgumentException
	 *
	 * @return void
	 */
	public static function setWeekStartsAt($day)
	{
		if ($day > static::SATURDAY || $day < static::SUNDAY) {
		    throw new InvalidArgumentException('Day of a week should be greater than or equal to 0 and less than or equal to 6.');
		}

		static::$weekStartsAt = $day;
	}


	/**
	 * Get the last day of week
	 *
	 * @return int
	 */
	public static function getWeekEndsAt()
	{
		return static::$weekEndsAt;
	}


	/**
	 * Set the last day of week
	 *
	 * @param int $day
	 *
	 * @throws InvalidArgumentException
	 *
	 * @return void
	 */
	public static function setWeekEndsAt($day)
	{
		if ($day > static::SATURDAY || $day < static::SUNDAY) {
		    throw new InvalidArgumentException('Day of a week should be greater than or equal to 0 and less than or equal to 6.');
		}

		static::$weekEndsAt = $day;
	}


	/**
	 * Get weekend days
	 *
	 * @return array
	 */
	public static function getWeekendDays()
	{
		return static::$weekendDays;
	}


	/**
	 * Set weekend days
	 *
	 * @param array $days
	 *
	 * @return void
	 */
	public static function setWeekendDays($days)
	{
		static::$weekendDays = $days;
	}


	/**
	 * get midday/noon hour
	 *
	 * @return int
	 */
	public static function getMidDayAt()
	{
		return static::$midDayAt;
	}


	/**
	 * Set midday/noon hour
	 *
	 * @param int $hour midday hour
	 *
	 * @return void
	 */
	public static function setMidDayAt($hour)
	{
		static::$midDayAt = $hour;
	}


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


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


	/**
	 * 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()
	{
		return static::getTestNow() !== null;
	}


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

		$date1 = new DateTime('2000-01-01T00:00:00Z');
		$date1->modify($time);
		$date2 = new DateTime('2001-12-25T00:00:00Z');
		$date2->modify($time);

		return $date1 != $date2;
	}


	/**
	 * Initialize the translator instance if necessary.
	 *
	 * @return \Symfony\Component\Translation\TranslatorInterface
	 */
	protected static function translator()
	{
		if (static::$translator === null) {
		    static::$translator = Translator::get();
		}

		return static::$translator;
	}


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


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


	/**
	 * Get the current translator locale
	 *
	 * @return string
	 */
	public static function getLocale()
	{
		return static::translator()->getLocale();
	}


	/**
	 * Set the current translator locale and indicate if the source locale file exists
	 *
	 * @param string $locale locale ex. en
	 *
	 * @return bool
	 */
	public static function setLocale($locale)
	{
		return static::translator()->setLocale($locale) !== false;
	}


	/**
	 * 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 $locale locale ex. en
	 *
	 * @return mixed
	 */
	public static function executeWithLocale($locale, $func)
	{
		$currentLocale = static::getLocale();
		$result = call_user_func($func, static::setLocale($locale) ? static::getLocale() : false, static::translator());
		static::setLocale($currentLocale);

		return $result;
	}


	/**
	 * Returns true if the given locale is internally supported and has short-units support.
	 * Support is considered enabled if either year, day or hour has a short variant translated.
	 *
	 * @param string $locale locale ex. en
	 *
	 * @return bool
	 */
	public static function localeHasShortUnits($locale)
	{
		return static::executeWithLocale($locale, function ($newLocale, TranslatorInterface $translator) {
		    return $newLocale &&
		        (
		            ($y = $translator->trans('y')) !== 'y' &&
		            $y !== $translator->trans('year')
		        ) || (
		            ($y = $translator->trans('d')) !== 'd' &&
		            $y !== $translator->trans('day')
		        ) || (
		            ($y = $translator->trans('h')) !== 'h' &&
		            $y !== $translator->trans('hour')
		        );
		});
	}


	/**
	 * Returns true if the given locale is internally supported and has diff syntax support (ago, from now, before, after).
	 * Support is considered enabled if the 4 sentences are translated in the given locale.
	 *
	 * @param string $locale locale ex. en
	 *
	 * @return bool
	 */
	public static function localeHasDiffSyntax($locale)
	{
		return static::executeWithLocale($locale, function ($newLocale, TranslatorInterface $translator) {
		    return $newLocale &&
		        $translator->trans('ago') !== 'ago' &&
		        $translator->trans('from_now') !== 'from_now' &&
		        $translator->trans('before') !== 'before' &&
		        $translator->trans('after') !== 'after';
		});
	}


	/**
	 * Returns true if the given locale is internally supported and has words for 1-day diff (just now, yesterday, tomorrow).
	 * Support is considered enabled if the 3 words are translated in the given locale.
	 *
	 * @param string $locale locale ex. en
	 *
	 * @return bool
	 */
	public static function localeHasDiffOneDayWords($locale)
	{
		return static::executeWithLocale($locale, function ($newLocale, TranslatorInterface $translator) {
		    return $newLocale &&
		        $translator->trans('diff_now') !== 'diff_now' &&
		        $translator->trans('diff_yesterday') !== 'diff_yesterday' &&
		        $translator->trans('diff_tomorrow') !== 'diff_tomorrow';
		});
	}


	/**
	 * Returns true if the given locale is internally supported and has words for 2-days diff (before yesterday, after tomorrow).
	 * Support is considered enabled if the 2 words are translated in the given locale.
	 *
	 * @param string $locale locale ex. en
	 *
	 * @return bool
	 */
	public static function localeHasDiffTwoDayWords($locale)
	{
		return static::executeWithLocale($locale, function ($newLocale, TranslatorInterface $translator) {
		    return $newLocale &&
		        $translator->trans('diff_before_yesterday') !== 'diff_before_yesterday' &&
		        $translator->trans('diff_after_tomorrow') !== 'diff_after_tomorrow';
		});
	}


	/**
	 * 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)
	{
		return static::executeWithLocale($locale, function ($newLocale, TranslatorInterface $translator) {
		    return $newLocale &&
		        $translator->trans('period_recurrences') !== 'period_recurrences' &&
		        $translator->trans('period_interval') !== 'period_interval' &&
		        $translator->trans('period_start_date') !== 'period_start_date' &&
		        $translator->trans('period_end_date') !== 'period_end_date';
		});
	}


	/**
	 * 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()
	{
		$translator = static::translator();
		$locales = array();
		if ($translator instanceof Translator) {
		    foreach (glob(__DIR__.'/Lang/*.php') as $file) {
		        $locales[] = substr($file, strrpos($file, '/') + 1, -4);
		    }

		    $locales = array_unique(array_merge($locales, array_keys($translator->getMessages())));
		}

		return $locales;
	}


	/**
	 * Set if UTF8 will be used for localized date/time
	 *
	 * @param bool $utf8
	 */
	public static function setUtf8($utf8)
	{
		static::$utf8 = $utf8;
	}


	/**
	 * Format the instance with the current locale.  You can set the current
	 * locale using setlocale() http://php.net/setlocale.
	 *
	 * @param string $format
	 *
	 * @return string
	 */
	public function formatLocalized($format)
	{
		if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
		    $format = preg_replace('#(?<!%)((?:%%)*)%e#', '\1%#d', $format); // @codeCoverageIgnore
		}

		$formatted = strftime($format, strtotime($this->toDateTimeString()));

		return static::$utf8 ? utf8_encode($formatted) : $formatted;
	}


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


	/**
	 * Set the default format used when type juggling a Carbon instance to a string
	 *
	 * @param string|Closure $format
	 *
	 * @return void
	 */
	public static function setToStringFormat($format)
	{
		static::$toStringFormat = $format;
	}


	/**
	 * Format the instance as a string using the set format
	 *
	 * @return string
	 */
	public function __toString()
	{
		$format = static::$toStringFormat;

		return $this->format($format instanceof Closure ? $format($this) : $format);
	}


	/**
	 * Format the instance as date
	 *
	 * @return string
	 */
	public function toDateString()
	{
		return $this->format('Y-m-d');
	}


	/**
	 * Format the instance as a readable date
	 *
	 * @return string
	 */
	public function toFormattedDateString()
	{
		return $this->format('M j, Y');
	}


	/**
	 * Format the instance as time
	 *
	 * @return string
	 */
	public function toTimeString()
	{
		return $this->format('H:i:s');
	}


	/**
	 * Format the instance as date and time
	 *
	 * @return string
	 */
	public function toDateTimeString()
	{
		return $this->format('Y-m-d H:i:s');
	}


	/**
	 * Format the instance as date and time T-separated with no timezone
	 *
	 * @example
	 * ```
	 * echo Carbon::now()->toDateTimeLocalString();
	 * ```
	 *
	 * @return string
	 */
	public function toDateTimeLocalString()
	{
		return $this->format('Y-m-d\TH:i:s');
	}


	/**
	 * Format the instance with day, date and time
	 *
	 * @return string
	 */
	public function toDayDateTimeString()
	{
		return $this->format('D, M j, Y g:i A');
	}


	/**
	 * Format the instance as ATOM
	 *
	 * @return string
	 */
	public function toAtomString()
	{
		return $this->format(static::ATOM);
	}


	/**
	 * Format the instance as COOKIE
	 *
	 * @return string
	 */
	public function toCookieString()
	{
		return $this->format(static::COOKIE);
	}


	/**
	 * Format the instance as ISO8601
	 *
	 * @return string
	 */
	public function toIso8601String()
	{
		return $this->toAtomString();
	}


	/**
	 * Format the instance as RFC822
	 *
	 * @return string
	 */
	public function toRfc822String()
	{
		return $this->format(static::RFC822);
	}


	/**
	 * Convert the instance to UTC and return as Zulu ISO8601
	 *
	 * @return string
	 */
	public function toIso8601ZuluString()
	{
		return $this->copy()->setTimezone('UTC')->format('Y-m-d\TH:i:s\Z');
	}


	/**
	 * Format the instance as RFC850
	 *
	 * @return string
	 */
	public function toRfc850String()
	{
		return $this->format(static::RFC850);
	}


	/**
	 * Format the instance as RFC1036
	 *
	 * @return string
	 */
	public function toRfc1036String()
	{
		return $this->format(static::RFC1036);
	}


	/**
	 * Format the instance as RFC1123
	 *
	 * @return string
	 */
	public function toRfc1123String()
	{
		return $this->format(static::RFC1123);
	}


	/**
	 * Format the instance as RFC2822
	 *
	 * @return string
	 */
	public function toRfc2822String()
	{
		return $this->format(static::RFC2822);
	}


	/**
	 * Format the instance as RFC3339
	 *
	 * @return string
	 */
	public function toRfc3339String()
	{
		return $this->format(static::RFC3339);
	}


	/**
	 * Format the instance as RSS
	 *
	 * @return string
	 */
	public function toRssString()
	{
		return $this->format(static::RSS);
	}


	/**
	 * Format the instance as W3C
	 *
	 * @return string
	 */
	public function toW3cString()
	{
		return $this->format(static::W3C);
	}


	/**
	 * Format the instance as RFC7231
	 *
	 * @return string
	 */
	public function toRfc7231String()
	{
		return $this->copy()
		    ->setTimezone('GMT')
		    ->format(static::RFC7231_FORMAT);
	}


	/**
	 * Get default array representation
	 *
	 * @return array
	 */
	public function toArray()
	{
		return array(
		    'year' => $this->year,
		    'month' => $this->month,
		    'day' => $this->day,
		    'dayOfWeek' => $this->dayOfWeek,
		    'dayOfYear' => $this->dayOfYear,
		    'hour' => $this->hour,
		    'minute' => $this->minute,
		    'second' => $this->second,
		    'micro' => $this->micro,
		    'timestamp' => $this->timestamp,
		    'formatted' => $this->format(self::DEFAULT_TO_STRING_FORMAT),
		    'timezone' => $this->timezone,
		);
	}


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


	/**
	 * Returns english human readable complete date string.
	 *
	 * @example
	 * ```
	 * echo Carbon::now()->toString();
	 * ```
	 *
	 * @return string
	 */
	public function toString()
	{
		return $this->format('D M j Y H:i:s \G\M\TO');
	}


	/**
	 * Return the ISO-8601 string (ex: 1977-04-22T06:00:00Z, if $keepOffset truthy, offset will be kept:
	 * 1977-04-22T01:00:00-05:00).
	 *
	 * @example
	 * ```
	 * echo Carbon::now('America/Toronto')->toISOString() . "\n";
	 * echo Carbon::now('America/Toronto')->toISOString(true) . "\n";
	 * ```
	 *
	 * @param bool $keepOffset Pass true to keep the date offset. Else forced to UTC.
	 *
	 * @return null|string
	 */
	public function toISOString($keepOffset = false)
	{
		if ($this->year === 0) {
		    return null;
		}

		$year = $this->year < 0 || $this->year > 9999
		    ? ($this->year < 0 ? '-' : '+').str_pad(abs($this->year), 6, '0', STR_PAD_LEFT)
		    : str_pad($this->year, 4, '0', STR_PAD_LEFT);
		$tz = $keepOffset ? $this->format('P') : 'Z';
		$date = $keepOffset ? $this : $this->copy()->setTimezone('UTC');

		return $year.$date->format('-m-d\TH:i:s.u').$tz;
	}


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


	/**
	 * Return native DateTime PHP object matching the current instance.
	 *
	 * @example
	 * ```
	 * var_dump(Carbon::now()->toDateTime());
	 * ```
	 *
	 * @return DateTime
	 */
	public function toDateTime()
	{
		return new DateTime($this->format('Y-m-d H:i:s.u'), $this->getTimezone());
	}


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


	/**
	 * Determines if the instance is equal to another
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
	 *
	 * @return bool
	 */
	public function eq($date)
	{
		return $this == $date;
	}


	/**
	 * Determines if the instance is equal to another
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
	 *
	 * @see eq()
	 *
	 * @return bool
	 */
	public function equalTo($date)
	{
		return $this->eq($date);
	}


	/**
	 * Determines if the instance is not equal to another
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
	 *
	 * @return bool
	 */
	public function ne($date)
	{
		return !$this->eq($date);
	}


	/**
	 * Determines if the instance is not equal to another
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
	 *
	 * @see ne()
	 *
	 * @return bool
	 */
	public function notEqualTo($date)
	{
		return $this->ne($date);
	}


	/**
	 * Determines if the instance is greater (after) than another
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
	 *
	 * @return bool
	 */
	public function gt($date)
	{
		return $this > $date;
	}


	/**
	 * Determines if the instance is greater (after) than another
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
	 *
	 * @see gt()
	 *
	 * @return bool
	 */
	public function greaterThan($date)
	{
		return $this->gt($date);
	}


	/**
	 * Determines if the instance is greater (after) than another
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
	 *
	 * @see gt()
	 *
	 * @return bool
	 */
	public function isAfter($date)
	{
		return $this->gt($date);
	}


	/**
	 * Determines if the instance is greater (after) than or equal to another
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
	 *
	 * @return bool
	 */
	public function gte($date)
	{
		return $this >= $date;
	}


	/**
	 * Determines if the instance is greater (after) than or equal to another
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
	 *
	 * @see gte()
	 *
	 * @return bool
	 */
	public function greaterThanOrEqualTo($date)
	{
		return $this->gte($date);
	}


	/**
	 * Determines if the instance is less (before) than another
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
	 *
	 * @return bool
	 */
	public function lt($date)
	{
		return $this < $date;
	}


	/**
	 * Determines if the instance is less (before) than another
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
	 *
	 * @see lt()
	 *
	 * @return bool
	 */
	public function lessThan($date)
	{
		return $this->lt($date);
	}


	/**
	 * Determines if the instance is less (before) than another
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
	 *
	 * @see lt()
	 *
	 * @return bool
	 */
	public function isBefore($date)
	{
		return $this->lt($date);
	}


	/**
	 * Determines if the instance is less (before) or equal to another
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
	 *
	 * @return bool
	 */
	public function lte($date)
	{
		return $this <= $date;
	}


	/**
	 * Determines if the instance is less (before) or equal to another
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date
	 *
	 * @see lte()
	 *
	 * @return bool
	 */
	public function lessThanOrEqualTo($date)
	{
		return $this->lte($date);
	}


	/**
	 * Determines if the instance is between two others
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date1
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date2
	 * @param bool                                    $equal Indicates if an equal to comparison should be done
	 *
	 * @return bool
	 */
	public function between($date1, $date2, $equal = true)
	{
		if ($date1->gt($date2)) {
		    $temp = $date1;
		    $date1 = $date2;
		    $date2 = $temp;
		}

		if ($equal) {
		    return $this->gte($date1) && $this->lte($date2);
		}

		return $this->gt($date1) && $this->lt($date2);
	}


	protected function floatDiffInSeconds($date)
	{
		$date = $this->resolveCarbon($date);

		return abs($this->diffInRealSeconds($date, false) + ($date->micro - $this->micro) / 1000000);
	}


	/**
	 * Determines if the instance is between two others
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date1
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date2
	 * @param bool                                    $equal Indicates if a > and < comparison should be used or <= or >=
	 *
	 * @return bool
	 */
	public function isBetween($date1, $date2, $equal = true)
	{
		return $this->between($date1, $date2, $equal);
	}


	/**
	 * Get the closest date from the instance.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date1
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date2
	 *
	 * @return static
	 */
	public function closest($date1, $date2)
	{
		return $this->floatDiffInSeconds($date1) < $this->floatDiffInSeconds($date2) ? $date1 : $date2;
	}


	/**
	 * Get the farthest date from the instance.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date1
	 * @param \Carbon\Carbon|\DateTimeInterface|mixed $date2
	 *
	 * @return static
	 */
	public function farthest($date1, $date2)
	{
		return $this->floatDiffInSeconds($date1) > $this->floatDiffInSeconds($date2) ? $date1 : $date2;
	}


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

		return $this->lt($date) ? $this : $date;
	}


	/**
	 * 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)
	{
		return $this->min($date);
	}


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

		return $this->gt($date) ? $this : $date;
	}


	/**
	 * 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 $this->max($date);
	}


	/**
	 * Determines if the instance is a weekday.
	 *
	 * @return bool
	 */
	public function isWeekday()
	{
		return !$this->isWeekend();
	}


	/**
	 * Determines if the instance is a weekend day.
	 *
	 * @return bool
	 */
	public function isWeekend()
	{
		return in_array($this->dayOfWeek, static::$weekendDays);
	}


	/**
	 * Determines if the instance is yesterday.
	 *
	 * @return bool
	 */
	public function isYesterday()
	{
		return $this->toDateString() === static::yesterday($this->getTimezone())->toDateString();
	}


	/**
	 * Determines if the instance is today.
	 *
	 * @return bool
	 */
	public function isToday()
	{
		return $this->toDateString() === $this->nowWithSameTz()->toDateString();
	}


	/**
	 * Determines if the instance is tomorrow.
	 *
	 * @return bool
	 */
	public function isTomorrow()
	{
		return $this->toDateString() === static::tomorrow($this->getTimezone())->toDateString();
	}


	/**
	 * Determines if the instance is within the next week.
	 *
	 * @return bool
	 */
	public function isNextWeek()
	{
		return $this->weekOfYear === $this->nowWithSameTz()->addWeek()->weekOfYear;
	}


	/**
	 * Determines if the instance is within the last week.
	 *
	 * @return bool
	 */
	public function isLastWeek()
	{
		return $this->weekOfYear === $this->nowWithSameTz()->subWeek()->weekOfYear;
	}


	/**
	 * Determines if the instance is within the next quarter.
	 *
	 * @return bool
	 */
	public function isNextQuarter()
	{
		return $this->quarter === $this->nowWithSameTz()->addQuarter()->quarter;
	}


	/**
	 * Determines if the instance is within the last quarter.
	 *
	 * @return bool
	 */
	public function isLastQuarter()
	{
		return $this->quarter === $this->nowWithSameTz()->subQuarter()->quarter;
	}


	/**
	 * Determines if the instance is within the next month.
	 *
	 * @return bool
	 */
	public function isNextMonth()
	{
		return $this->month === $this->nowWithSameTz()->addMonthNoOverflow()->month;
	}


	/**
	 * Determines if the instance is within the last month.
	 *
	 * @return bool
	 */
	public function isLastMonth()
	{
		return $this->month === $this->nowWithSameTz()->subMonthNoOverflow()->month;
	}


	/**
	 * Determines if the instance is within next year.
	 *
	 * @return bool
	 */
	public function isNextYear()
	{
		return $this->year === $this->nowWithSameTz()->addYear()->year;
	}


	/**
	 * Determines if the instance is within the previous year.
	 *
	 * @return bool
	 */
	public function isLastYear()
	{
		return $this->year === $this->nowWithSameTz()->subYear()->year;
	}


	/**
	 * Determines if the instance is in the future, ie. greater (after) than now.
	 *
	 * @return bool
	 */
	public function isFuture()
	{
		return $this->gt($this->nowWithSameTz());
	}


	/**
	 * Determines if the instance is in the past, ie. less (before) than now.
	 *
	 * @return bool
	 */
	public function isPast()
	{
		return $this->lt($this->nowWithSameTz());
	}


	/**
	 * Determines if the instance is a leap year.
	 *
	 * @return bool
	 */
	public function isLeapYear()
	{
		return $this->format('L') === '1';
	}


	/**
	 * Determines if the instance is a long year
	 *
	 * @see https://en.wikipedia.org/wiki/ISO_8601#Week_dates
	 *
	 * @return bool
	 */
	public function isLongYear()
	{
		return static::create($this->year, 12, 28, 0, 0, 0, $this->tz)->weekOfYear === 53;
	}


	/**
	 * Compares the formatted values of the two dates.
	 *
	 * @param string                                 $format The date formats to compare.
	 * @param \Carbon\Carbon|\DateTimeInterface|null $date   The instance to compare with or null to use current day.
	 *
	 * @throws \InvalidArgumentException
	 *
	 * @return bool
	 */
	public function isSameAs($format, $date = null)
	{
		$date = $date ?: static::now($this->tz);

		static::expectDateTime($date, 'null');

		return $this->format($format) === $date->format($format);
	}


	/**
	 * Determines if the instance is in the current year.
	 *
	 * @return bool
	 */
	public function isCurrentYear()
	{
		return $this->isSameYear();
	}


	/**
	 * Checks if the passed in date is in the same year as the instance year.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|null $date The instance to compare with or null to use current day.
	 *
	 * @return bool
	 */
	public function isSameYear($date = null)
	{
		return $this->isSameAs('Y', $date);
	}


	/**
	 * Determines if the instance is in the current month.
	 *
	 * @return bool
	 */
	public function isCurrentQuarter()
	{
		return $this->isSameQuarter();
	}


	/**
	 * Checks if the passed in date is in the same quarter as the instance quarter (and year if needed).
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|null $date       The instance to compare with or null to use current day.
	 * @param bool                                   $ofSameYear Check if it is the same month in the same year.
	 *
	 * @return bool
	 */
	public function isSameQuarter($date = null, $ofSameYear = null)
	{
		$date = $date ? static::instance($date) : static::now($this->tz);

		static::expectDateTime($date, 'null');

		$ofSameYear = is_null($ofSameYear) ? static::shouldCompareYearWithMonth() : $ofSameYear;

		return $this->quarter === $date->quarter && (!$ofSameYear || $this->isSameYear($date));
	}


	/**
	 * Determines if the instance is in the current month.
	 *
	 * @param bool $ofSameYear Check if it is the same month in the same year.
	 *
	 * @return bool
	 */
	public function isCurrentMonth($ofSameYear = null)
	{
		return $this->isSameMonth(null, $ofSameYear);
	}


	/**
	 * Checks if the passed in date is in the same month as the instance´s month.
	 *
	 * Note that this defaults to only comparing the month while ignoring the year.
	 * To test if it is the same exact month of the same year, pass in true as the second parameter.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|null $date       The instance to compare with or null to use the current date.
	 * @param bool                                   $ofSameYear Check if it is the same month in the same year.
	 *
	 * @return bool
	 */
	public function isSameMonth($date = null, $ofSameYear = null)
	{
		$ofSameYear = is_null($ofSameYear) ? static::shouldCompareYearWithMonth() : $ofSameYear;

		return $this->isSameAs($ofSameYear ? 'Y-m' : 'm', $date);
	}


	/**
	 * Determines if the instance is in the current day.
	 *
	 * @return bool
	 */
	public function isCurrentDay()
	{
		return $this->isSameDay();
	}


	/**
	 * Checks if the passed in date is the same exact day as the instance´s day.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|null $date The instance to compare with or null to use the current date.
	 *
	 * @return bool
	 */
	public function isSameDay($date = null)
	{
		return $this->isSameAs('Y-m-d', $date);
	}


	/**
	 * Determines if the instance is in the current hour.
	 *
	 * @return bool
	 */
	public function isCurrentHour()
	{
		return $this->isSameHour();
	}


	/**
	 * Checks if the passed in date is the same exact hour as the instance´s hour.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|null $date The instance to compare with or null to use the current date.
	 *
	 * @return bool
	 */
	public function isSameHour($date = null)
	{
		return $this->isSameAs('Y-m-d H', $date);
	}


	/**
	 * Determines if the instance is in the current minute.
	 *
	 * @return bool
	 */
	public function isCurrentMinute()
	{
		return $this->isSameMinute();
	}


	/**
	 * Checks if the passed in date is the same exact minute as the instance´s minute.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|null $date The instance to compare with or null to use the current date.
	 *
	 * @return bool
	 */
	public function isSameMinute($date = null)
	{
		return $this->isSameAs('Y-m-d H:i', $date);
	}


	/**
	 * Determines if the instance is in the current second.
	 *
	 * @return bool
	 */
	public function isCurrentSecond()
	{
		return $this->isSameSecond();
	}


	/**
	 * Checks if the passed in date is the same exact second as the instance´s second.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|null $date The instance to compare with or null to use the current date.
	 *
	 * @return bool
	 */
	public function isSameSecond($date = null)
	{
		return $this->isSameAs('Y-m-d H:i:s', $date);
	}


	/**
	 * Checks if this day is a specific day of the week.
	 *
	 * @param int $dayOfWeek
	 *
	 * @return bool
	 */
	public function isDayOfWeek($dayOfWeek)
	{
		return $this->dayOfWeek === $dayOfWeek;
	}


	/**
	 * Checks if this day is a Sunday.
	 *
	 * @return bool
	 */
	public function isSunday()
	{
		return $this->dayOfWeek === static::SUNDAY;
	}


	/**
	 * Checks if this day is a Monday.
	 *
	 * @return bool
	 */
	public function isMonday()
	{
		return $this->dayOfWeek === static::MONDAY;
	}


	/**
	 * Checks if this day is a Tuesday.
	 *
	 * @return bool
	 */
	public function isTuesday()
	{
		return $this->dayOfWeek === static::TUESDAY;
	}


	/**
	 * Checks if this day is a Wednesday.
	 *
	 * @return bool
	 */
	public function isWednesday()
	{
		return $this->dayOfWeek === static::WEDNESDAY;
	}


	/**
	 * Checks if this day is a Thursday.
	 *
	 * @return bool
	 */
	public function isThursday()
	{
		return $this->dayOfWeek === static::THURSDAY;
	}


	/**
	 * Checks if this day is a Friday.
	 *
	 * @return bool
	 */
	public function isFriday()
	{
		return $this->dayOfWeek === static::FRIDAY;
	}


	/**
	 * Checks if this day is a Saturday.
	 *
	 * @return bool
	 */
	public function isSaturday()
	{
		return $this->dayOfWeek === static::SATURDAY;
	}


	/**
	 * Check if its the birthday. Compares the date/month values of the two dates.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|null $date The instance to compare with or null to use current day.
	 *
	 * @return bool
	 */
	public function isBirthday($date = null)
	{
		return $this->isSameAs('md', $date);
	}


	/**
	 * Check if today is the last day of the Month
	 *
	 * @return bool
	 */
	public function isLastOfMonth()
	{
		return $this->day === $this->daysInMonth;
	}


	/**
	 * Check if the instance is start of day / midnight.
	 *
	 * @param bool $checkMicroseconds check time at microseconds precision
	 *                                /!\ Warning, this is not reliable with PHP < 7.1.4
	 *
	 * @return bool
	 */
	public function isStartOfDay($checkMicroseconds = false)
	{
		return $checkMicroseconds
		    ? $this->format('H:i:s.u') === '00:00:00.000000'
		    : $this->format('H:i:s') === '00:00:00';
	}


	/**
	 * Check if the instance is end of day.
	 *
	 * @param bool $checkMicroseconds check time at microseconds precision
	 *                                /!\ Warning, this is not reliable with PHP < 7.1.4
	 *
	 * @return bool
	 */
	public function isEndOfDay($checkMicroseconds = false)
	{
		return $checkMicroseconds
		    ? $this->format('H:i:s.u') === '23:59:59.999999'
		    : $this->format('H:i:s') === '23:59:59';
	}


	/**
	 * Check if the instance is start of day / midnight.
	 *
	 * @return bool
	 */
	public function isMidnight()
	{
		return $this->isStartOfDay();
	}


	/**
	 * Check if the instance is midday.
	 *
	 * @return bool
	 */
	public function isMidday()
	{
		return $this->format('G:i:s') === static::$midDayAt.':00:00';
	}


	/**
	 * Checks if the (date)time string is in a given format.
	 *
	 * @param string $date
	 * @param string $format
	 *
	 * @return bool
	 */
	public static function hasFormat($date, $format)
	{
		try {
		    // Try to create a DateTime object. Throws an InvalidArgumentException if the provided time string
		    // doesn't match the format in any way.
		    static::createFromFormat($format, $date);

		    // createFromFormat() is known to handle edge cases silently.
		    // E.g. "1975-5-1" (Y-n-j) will still be parsed correctly when "Y-m-d" is supplied as the format.
		    // To ensure we're really testing against our desired format, perform an additional regex validation.
		    $regex = strtr(
		        preg_quote($format, '/'),
		        static::$regexFormats
		    );

		    return (bool) preg_match('/^'.$regex.'$/', $date);
		} catch (InvalidArgumentException $e) {
		}

		return false;
	}


	/**
	 * Add centuries to the instance. Positive $value travels forward while
	 * negative $value travels into the past.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addCenturies($value)
	{
		return $this->addYears(static::YEARS_PER_CENTURY * $value);
	}


	/**
	 * Add a century to the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addCentury($value = 1)
	{
		return $this->addCenturies($value);
	}


	/**
	 * Remove centuries from the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subCenturies($value)
	{
		return $this->addCenturies(-1 * $value);
	}


	/**
	 * Remove a century from the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subCentury($value = 1)
	{
		return $this->subCenturies($value);
	}


	/**
	 * Add years to the instance. Positive $value travel forward while
	 * negative $value travel into the past.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addYears($value)
	{
		if ($this->shouldOverflowYears()) {
		    return $this->addYearsWithOverflow($value);
		}

		return $this->addYearsNoOverflow($value);
	}


	/**
	 * Add a year to the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addYear($value = 1)
	{
		return $this->addYears($value);
	}


	/**
	 * Add years to the instance with no overflow of months
	 * Positive $value travel forward while
	 * negative $value travel into the past.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addYearsNoOverflow($value)
	{
		return $this->addMonthsNoOverflow($value * static::MONTHS_PER_YEAR);
	}


	/**
	 * Add year with overflow months set to false
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addYearNoOverflow($value = 1)
	{
		return $this->addYearsNoOverflow($value);
	}


	/**
	 * Add years to the instance.
	 * Positive $value travel forward while
	 * negative $value travel into the past.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addYearsWithOverflow($value)
	{
		return $this->modify((int) $value.' year');
	}


	/**
	 * Add year with overflow.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addYearWithOverflow($value = 1)
	{
		return $this->addYearsWithOverflow($value);
	}


	/**
	 * Remove years from the instance.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subYears($value)
	{
		return $this->addYears(-1 * $value);
	}


	/**
	 * Remove a year from the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subYear($value = 1)
	{
		return $this->subYears($value);
	}


	/**
	 * Remove years from the instance with no month overflow.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subYearsNoOverflow($value)
	{
		return $this->subMonthsNoOverflow($value * static::MONTHS_PER_YEAR);
	}


	/**
	 * Remove year from the instance with no month overflow
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subYearNoOverflow($value = 1)
	{
		return $this->subYearsNoOverflow($value);
	}


	/**
	 * Remove years from the instance.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subYearsWithOverflow($value)
	{
		return $this->subMonthsWithOverflow($value * static::MONTHS_PER_YEAR);
	}


	/**
	 * Remove year from the instance.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subYearWithOverflow($value = 1)
	{
		return $this->subYearsWithOverflow($value);
	}


	/**
	 * Add quarters to the instance. Positive $value travels forward while
	 * negative $value travels into the past.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addQuarters($value)
	{
		return $this->addMonths(static::MONTHS_PER_QUARTER * $value);
	}


	/**
	 * Add a quarter to the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addQuarter($value = 1)
	{
		return $this->addQuarters($value);
	}


	/**
	 * Remove quarters from the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subQuarters($value)
	{
		return $this->addQuarters(-1 * $value);
	}


	/**
	 * Remove a quarter from the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subQuarter($value = 1)
	{
		return $this->subQuarters($value);
	}


	/**
	 * Add months to the instance. Positive $value travels forward while
	 * negative $value travels into the past.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addMonths($value)
	{
		if (static::shouldOverflowMonths()) {
		    return $this->addMonthsWithOverflow($value);
		}

		return $this->addMonthsNoOverflow($value);
	}


	/**
	 * Add a month to the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addMonth($value = 1)
	{
		return $this->addMonths($value);
	}


	/**
	 * Remove months from the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subMonths($value)
	{
		return $this->addMonths(-1 * $value);
	}


	/**
	 * Remove a month from the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subMonth($value = 1)
	{
		return $this->subMonths($value);
	}


	/**
	 * Add months to the instance. Positive $value travels forward while
	 * negative $value travels into the past.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addMonthsWithOverflow($value)
	{
		return $this->modify((int) $value.' month');
	}


	/**
	 * Add a month to the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addMonthWithOverflow($value = 1)
	{
		return $this->addMonthsWithOverflow($value);
	}


	/**
	 * Remove months from the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subMonthsWithOverflow($value)
	{
		return $this->addMonthsWithOverflow(-1 * $value);
	}


	/**
	 * Remove a month from the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subMonthWithOverflow($value = 1)
	{
		return $this->subMonthsWithOverflow($value);
	}


	/**
	 * Add months without overflowing to the instance. Positive $value
	 * travels forward while negative $value travels into the past.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addMonthsNoOverflow($value)
	{
		$day = $this->day;

		$this->modify((int) $value.' month');

		if ($day !== $this->day) {
		    $this->modify('last day of previous month');
		}

		return $this;
	}


	/**
	 * Add a month with no overflow to the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addMonthNoOverflow($value = 1)
	{
		return $this->addMonthsNoOverflow($value);
	}


	/**
	 * Remove months with no overflow from the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subMonthsNoOverflow($value)
	{
		return $this->addMonthsNoOverflow(-1 * $value);
	}


	/**
	 * Remove a month with no overflow from the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subMonthNoOverflow($value = 1)
	{
		return $this->subMonthsNoOverflow($value);
	}


	/**
	 * Add days to the instance. Positive $value travels forward while
	 * negative $value travels into the past.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addDays($value)
	{
		return $this->modify((int) $value.' day');
	}


	/**
	 * Add a day to the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addDay($value = 1)
	{
		return $this->addDays($value);
	}


	/**
	 * Remove days from the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subDays($value)
	{
		return $this->addDays(-1 * $value);
	}


	/**
	 * Remove a day from the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subDay($value = 1)
	{
		return $this->subDays($value);
	}


	/**
	 * Add weekdays to the instance. Positive $value travels forward while
	 * negative $value travels into the past.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addWeekdays($value)
	{
		$t = $this->toTimeString();
		$this->modify((int) $value.' weekday');

		return $this->setTimeFromTimeString($t);
	}


	/**
	 * Add a weekday to the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addWeekday($value = 1)
	{
		return $this->addWeekdays($value);
	}


	/**
	 * Remove weekdays from the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subWeekdays($value)
	{
		return $this->addWeekdays(-1 * $value);
	}


	/**
	 * Remove a weekday from the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subWeekday($value = 1)
	{
		return $this->subWeekdays($value);
	}


	/**
	 * Add weeks to the instance. Positive $value travels forward while
	 * negative $value travels into the past.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addWeeks($value)
	{
		return $this->modify((int) $value.' week');
	}


	/**
	 * Add a week to the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addWeek($value = 1)
	{
		return $this->addWeeks($value);
	}


	/**
	 * Remove weeks to the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subWeeks($value)
	{
		return $this->addWeeks(-1 * $value);
	}


	/**
	 * Remove a week from the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subWeek($value = 1)
	{
		return $this->subWeeks($value);
	}


	/**
	 * Add hours to the instance. Positive $value travels forward while
	 * negative $value travels into the past.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addHours($value)
	{
		return $this->modify((int) $value.' hour');
	}


	/**
	 * Add hours to the instance using timestamp. Positive $value travels
	 * forward while negative $value travels into the past.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addRealHours($value)
	{
		return $this->addRealMinutes($value * static::MINUTES_PER_HOUR);
	}


	/**
	 * Add an hour to the instance.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addHour($value = 1)
	{
		return $this->addHours($value);
	}


	/**
	 * Add an hour to the instance using timestamp.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addRealHour($value = 1)
	{
		return $this->addRealHours($value);
	}


	/**
	 * Remove hours from the instance.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subHours($value)
	{
		return $this->addHours(-1 * $value);
	}


	/**
	 * Remove hours from the instance using timestamp.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subRealHours($value)
	{
		return $this->addRealHours(-1 * $value);
	}


	/**
	 * Remove an hour from the instance.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subHour($value = 1)
	{
		return $this->subHours($value);
	}


	/**
	 * Remove an hour from the instance.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subRealHour($value = 1)
	{
		return $this->subRealHours($value);
	}


	/**
	 * Add minutes to the instance using timestamp. Positive $value
	 * travels forward while negative $value travels into the past.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addMinutes($value)
	{
		return $this->modify((int) $value.' minute');
	}


	/**
	 * Add minutes to the instance using timestamp. Positive $value travels
	 * forward while negative $value travels into the past.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addRealMinutes($value)
	{
		return $this->addRealSeconds($value * static::SECONDS_PER_MINUTE);
	}


	/**
	 * Add a minute to the instance.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addMinute($value = 1)
	{
		return $this->addMinutes($value);
	}


	/**
	 * Add a minute to the instance using timestamp.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addRealMinute($value = 1)
	{
		return $this->addRealMinutes($value);
	}


	/**
	 * Remove a minute from the instance.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subMinute($value = 1)
	{
		return $this->subMinutes($value);
	}


	/**
	 * Remove a minute from the instance using timestamp.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subRealMinute($value = 1)
	{
		return $this->addRealMinutes(-1 * $value);
	}


	/**
	 * Remove minutes from the instance.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subMinutes($value)
	{
		return $this->addMinutes(-1 * $value);
	}


	/**
	 * Remove a minute from the instance using timestamp.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subRealMinutes($value = 1)
	{
		return $this->subRealMinute($value);
	}


	/**
	 * Add seconds to the instance. Positive $value travels forward while
	 * negative $value travels into the past.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addSeconds($value)
	{
		return $this->modify((int) $value.' second');
	}


	/**
	 * Add seconds to the instance using timestamp. Positive $value travels
	 * forward while negative $value travels into the past.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addRealSeconds($value)
	{
		return $this->setTimestamp($this->getTimestamp() + $value);
	}


	/**
	 * Add a second to the instance.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addSecond($value = 1)
	{
		return $this->addSeconds($value);
	}


	/**
	 * Add a second to the instance using timestamp.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function addRealSecond($value = 1)
	{
		return $this->addRealSeconds($value);
	}


	/**
	 * Remove seconds from the instance.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subSeconds($value)
	{
		return $this->addSeconds(-1 * $value);
	}


	/**
	 * Remove seconds from the instance using timestamp.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subRealSeconds($value)
	{
		return $this->addRealSeconds(-1 * $value);
	}


	/**
	 * Remove a second from the instance
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subSecond($value = 1)
	{
		return $this->subSeconds($value);
	}


	/**
	 * Remove a second from the instance using timestamp.
	 *
	 * @param int $value
	 *
	 * @return static
	 */
	public function subRealSecond($value = 1)
	{
		return $this->subRealSeconds($value);
	}


	/**
	 * @param DateInterval $diff
	 * @param bool         $absolute
	 * @param bool         $trimMicroseconds
	 *
	 * @return CarbonInterval
	 */
	protected static function fixDiffInterval(DateInterval $diff, $absolute, $trimMicroseconds)
	{
		$diff = CarbonInterval::instance($diff, $trimMicroseconds);

		// @codeCoverageIgnoreStart
		if (version_compare(PHP_VERSION, '7.1.0-dev', '<')) {
		    return $diff;
		}

		// Work-around for https://bugs.php.net/bug.php?id=77145
		if ($diff->f > 0 && $diff->y === -1 && $diff->m === 11 && $diff->d >= 27 && $diff->h === 23 && $diff->i === 59 && $diff->s === 59) {
		    $diff->y = 0;
		    $diff->m = 0;
		    $diff->d = 0;
		    $diff->h = 0;
		    $diff->i = 0;
		    $diff->s = 0;
		    $diff->f = (1000000 - round($diff->f * 1000000)) / 1000000;
		    $diff->invert();
		} elseif ($diff->f < 0) {
		    if ($diff->s !== 0 || $diff->i !== 0 || $diff->h !== 0 || $diff->d !== 0 || $diff->m !== 0 || $diff->y !== 0) {
		        $diff->f = (round($diff->f * 1000000) + 1000000) / 1000000;
		        $diff->s--;
		        if ($diff->s < 0) {
		            $diff->s += 60;
		            $diff->i--;
		            if ($diff->i < 0) {
		                $diff->i += 60;
		                $diff->h--;
		                if ($diff->h < 0) {
		                    $diff->h += 24;
		                    $diff->d--;
		                    if ($diff->d < 0) {
		                        $diff->d += 30;
		                        $diff->m--;
		                        if ($diff->m < 0) {
		                            $diff->m += 12;
		                            $diff->y--;
		                        }
		                    }
		                }
		            }
		        }
		    } else {
		        $diff->f *= -1;
		        $diff->invert();
		    }
		}
		// @codeCoverageIgnoreEnd
		if ($absolute && $diff->invert) {
		    $diff->invert();
		}

		return $diff;
	}


	/**
	 * Get the difference as a CarbonInterval instance.
	 *
	 * Pass false as second argument to get a microseconds-precise interval. Else
	 * microseconds in the original interval will not be kept.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute         Get the absolute of the difference
	 * @param bool                                          $trimMicroseconds (true by default)
	 *
	 * @return CarbonInterval
	 */
	public function diffAsCarbonInterval($date = null, $absolute = true, $trimMicroseconds = true)
	{
		$from = $this;
		$to = $this->resolveCarbon($date);

		if ($trimMicroseconds) {
		    $from = $from->copy()->startOfSecond();
		    $to = $to->copy()->startOfSecond();
		}

		return static::fixDiffInterval($from->diff($to, $absolute), $absolute, $trimMicroseconds);
	}


	/**
	 * Get the difference in years
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute Get the absolute of the difference
	 *
	 * @return int
	 */
	public function diffInYears($date = null, $absolute = true)
	{
		return (int) $this->diff($this->resolveCarbon($date), $absolute)->format('%r%y');
	}


	/**
	 * Get the difference in months
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute Get the absolute of the difference
	 *
	 * @return int
	 */
	public function diffInMonths($date = null, $absolute = true)
	{
		$date = $this->resolveCarbon($date);

		return $this->diffInYears($date, $absolute) * static::MONTHS_PER_YEAR + (int) $this->diff($date, $absolute)->format('%r%m');
	}


	/**
	 * Get the difference in weeks
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute Get the absolute of the difference
	 *
	 * @return int
	 */
	public function diffInWeeks($date = null, $absolute = true)
	{
		return (int) ($this->diffInDays($date, $absolute) / static::DAYS_PER_WEEK);
	}


	/**
	 * Get the difference in days
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute Get the absolute of the difference
	 *
	 * @return int
	 */
	public function diffInDays($date = null, $absolute = true)
	{
		return (int) $this->diff($this->resolveCarbon($date), $absolute)->format('%r%a');
	}


	/**
	 * Get the difference in days using a filter closure
	 *
	 * @param Closure                                       $callback
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute Get the absolute of the difference
	 *
	 * @return int
	 */
	public function diffInDaysFiltered(Closure $callback, $date = null, $absolute = true)
	{
		return $this->diffFiltered(CarbonInterval::day(), $callback, $date, $absolute);
	}


	/**
	 * Get the difference in hours using a filter closure
	 *
	 * @param Closure                                       $callback
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute Get the absolute of the difference
	 *
	 * @return int
	 */
	public function diffInHoursFiltered(Closure $callback, $date = null, $absolute = true)
	{
		return $this->diffFiltered(CarbonInterval::hour(), $callback, $date, $absolute);
	}


	/**
	 * Get the difference by the given interval using a filter closure
	 *
	 * @param CarbonInterval                                $ci       An interval to traverse by
	 * @param Closure                                       $callback
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute Get the absolute of the difference
	 *
	 * @return int
	 */
	public function diffFiltered(CarbonInterval $ci, Closure $callback, $date = null, $absolute = true)
	{
		$start = $this;
		$end = $this->resolveCarbon($date);
		$inverse = false;

		if ($end < $start) {
		    $start = $end;
		    $end = $this;
		    $inverse = true;
		}

		$period = new DatePeriod($start, $ci, $end);
		$values = array_filter(iterator_to_array($period), function ($date) use ($callback) {
		    return call_user_func($callback, Carbon::instance($date));
		});

		$diff = count($values);

		return $inverse && !$absolute ? -$diff : $diff;
	}


	/**
	 * Get the difference in weekdays
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute Get the absolute of the difference
	 *
	 * @return int
	 */
	public function diffInWeekdays($date = null, $absolute = true)
	{
		return $this->diffInDaysFiltered(function (Carbon $date) {
		    return $date->isWeekday();
		}, $date, $absolute);
	}


	/**
	 * Get the difference in weekend days using a filter
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute Get the absolute of the difference
	 *
	 * @return int
	 */
	public function diffInWeekendDays($date = null, $absolute = true)
	{
		return $this->diffInDaysFiltered(function (Carbon $date) {
		    return $date->isWeekend();
		}, $date, $absolute);
	}


	/**
	 * Get the difference in hours.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute Get the absolute of the difference
	 *
	 * @return int
	 */
	public function diffInHours($date = null, $absolute = true)
	{
		return (int) ($this->diffInSeconds($date, $absolute) / static::SECONDS_PER_MINUTE / static::MINUTES_PER_HOUR);
	}


	/**
	 * Get the difference in hours using timestamps.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute Get the absolute of the difference
	 *
	 * @return int
	 */
	public function diffInRealHours($date = null, $absolute = true)
	{
		return (int) ($this->diffInRealSeconds($date, $absolute) / static::SECONDS_PER_MINUTE / static::MINUTES_PER_HOUR);
	}


	/**
	 * Get the difference in minutes.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute Get the absolute of the difference
	 *
	 * @return int
	 */
	public function diffInMinutes($date = null, $absolute = true)
	{
		return (int) ($this->diffInSeconds($date, $absolute) / static::SECONDS_PER_MINUTE);
	}


	/**
	 * Get the difference in minutes using timestamps.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute Get the absolute of the difference
	 *
	 * @return int
	 */
	public function diffInRealMinutes($date = null, $absolute = true)
	{
		return (int) ($this->diffInRealSeconds($date, $absolute) / static::SECONDS_PER_MINUTE);
	}


	/**
	 * Get the difference in seconds.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute Get the absolute of the difference
	 *
	 * @return int
	 */
	public function diffInSeconds($date = null, $absolute = true)
	{
		$diff = $this->diff($this->resolveCarbon($date));
		if (!$diff->days && version_compare(PHP_VERSION, '5.4.0-dev', '>=')) {
		    $diff = static::fixDiffInterval($diff, $absolute, false);
		}
		$value = $diff->days * static::HOURS_PER_DAY * static::MINUTES_PER_HOUR * static::SECONDS_PER_MINUTE +
		    $diff->h * static::MINUTES_PER_HOUR * static::SECONDS_PER_MINUTE +
		    $diff->i * static::SECONDS_PER_MINUTE +
		    $diff->s;

		return $absolute || !$diff->invert ? $value : -$value;
	}


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

		return $absolute ? abs($value) : $value;
	}


	/**
	 * Get the difference in milliseconds.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute Get the absolute of the difference
	 *
	 * @return int
	 */
	public function diffInMilliseconds($date = null, $absolute = true)
	{
		return (int) ($this->diffInMicroseconds($date, $absolute) / static::MICROSECONDS_PER_MILLISECOND);
	}


	/**
	 * Get the difference in milliseconds using timestamps.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute Get the absolute of the difference
	 *
	 * @return int
	 */
	public function diffInRealMilliseconds($date = null, $absolute = true)
	{
		return (int) ($this->diffInRealMicroseconds($date, $absolute) / static::MICROSECONDS_PER_MILLISECOND);
	}


	/**
	 * Get the difference in microseconds.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute Get the absolute of the difference
	 *
	 * @return int
	 */
	public function diffInMicroseconds($date = null, $absolute = true)
	{
		$diff = $this->diff($this->resolveCarbon($date));
		$micro = isset($diff->f) ? $diff->f : 0;
		$value = (int) round((((($diff->days * static::HOURS_PER_DAY) +
		    $diff->h) * static::MINUTES_PER_HOUR +
		    $diff->i) * static::SECONDS_PER_MINUTE +
		    ($micro + $diff->s)) * static::MICROSECONDS_PER_SECOND);

		return $absolute || !$diff->invert ? $value : -$value;
	}


	/**
	 * Get the difference in microseconds using timestamps.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 * @param bool                                          $absolute Get the absolute of the difference
	 *
	 * @return int
	 */
	public function diffInRealMicroseconds($date = null, $absolute = true)
	{
		$date = $this->resolveCarbon($date);
		$value = ($date->timestamp - $this->timestamp) * static::MICROSECONDS_PER_SECOND +
		    $date->micro - $this->micro;

		return $absolute ? abs($value) : $value;
	}


	/**
	 * The number of seconds since midnight.
	 *
	 * @return int
	 */
	public function secondsSinceMidnight()
	{
		return $this->diffInSeconds($this->copy()->startOfDay());
	}


	/**
	 * The number of seconds until 23:59:59.
	 *
	 * @return int
	 */
	public function secondsUntilEndOfDay()
	{
		return $this->diffInSeconds($this->copy()->endOfDay());
	}


	/**
	 * Get the difference in a human readable format in the current locale.
	 *
	 * When comparing a value in the past to default now:
	 * 1 hour ago
	 * 5 months ago
	 *
	 * When comparing a value in the future to default now:
	 * 1 hour from now
	 * 5 months from now
	 *
	 * When comparing a value in the past to another value:
	 * 1 hour before
	 * 5 months before
	 *
	 * When comparing a value in the future to another value:
	 * 1 hour after
	 * 5 months after
	 *
	 * @param Carbon|null $other
	 * @param bool        $absolute removes time difference modifiers ago, after, etc
	 * @param bool        $short    displays short format of time units
	 * @param int         $parts    displays number of parts in the interval
	 *
	 * @return string
	 */
	public function diffForHumans($other = null, $absolute = false, $short = false, $parts = 1)
	{
		$isNow = $other === null;
		$relativeToNow = $isNow;

		if ($absolute === static::DIFF_RELATIVE_TO_NOW) {
		    $absolute = false;
		    $relativeToNow = true;
		} elseif ($absolute === static::DIFF_RELATIVE_TO_OTHER) {
		    $absolute = false;
		    $relativeToNow = false;
		}

		$interval = array();

		$parts = min(6, max(1, (int) $parts));
		$count = 1;
		$unit = $short ? 's' : 'second';

		if ($isNow) {
		    $other = $this->nowWithSameTz();
		} elseif (!$other instanceof DateTime && !$other instanceof DateTimeInterface) {
		    $other = static::parse($other);
		}

		$diffInterval = $this->diff($other);

		$diffIntervalArray = array(
		    array('value' => $diffInterval->y, 'unit' => 'year',    'unitShort' => 'y'),
		    array('value' => $diffInterval->m, 'unit' => 'month',   'unitShort' => 'm'),
		    array('value' => $diffInterval->d, 'unit' => 'day',     'unitShort' => 'd'),
		    array('value' => $diffInterval->h, 'unit' => 'hour',    'unitShort' => 'h'),
		    array('value' => $diffInterval->i, 'unit' => 'minute',  'unitShort' => 'min'),
		    array('value' => $diffInterval->s, 'unit' => 'second',  'unitShort' => 's'),
		);

		foreach ($diffIntervalArray as $diffIntervalData) {
		    if ($diffIntervalData['value'] > 0) {
		        $unit = $short ? $diffIntervalData['unitShort'] : $diffIntervalData['unit'];
		        $count = $diffIntervalData['value'];

		        if ($diffIntervalData['unit'] === 'day' && $count >= static::DAYS_PER_WEEK) {
		            $unit = $short ? 'w' : 'week';
		            $count = (int) ($count / static::DAYS_PER_WEEK);

		            $interval[] = static::translator()->transChoice($unit, $count, array(':count' => $count));

		            // get the count days excluding weeks (might be zero)
		            $numOfDaysCount = (int) ($diffIntervalData['value'] - ($count * static::DAYS_PER_WEEK));

		            if ($numOfDaysCount > 0 && count($interval) < $parts) {
		                $unit = $short ? 'd' : 'day';
		                $count = $numOfDaysCount;
		                $interval[] = static::translator()->transChoice($unit, $count, array(':count' => $count));
		            }
		        } else {
		            $interval[] = static::translator()->transChoice($unit, $count, array(':count' => $count));
		        }
		    }

		    // break the loop after we get the required number of parts in array
		    if (count($interval) >= $parts) {
		        break;
		    }
		}

		if (count($interval) === 0) {
		    if ($isNow && static::getHumanDiffOptions() & self::JUST_NOW) {
		        $key = 'diff_now';
		        $translation = static::translator()->trans($key);
		        if ($translation !== $key) {
		            return $translation;
		        }
		    }
		    $count = static::getHumanDiffOptions() & self::NO_ZERO_DIFF ? 1 : 0;
		    $unit = $short ? 's' : 'second';
		    $interval[] = static::translator()->transChoice($unit, $count, array(':count' => $count));
		}

		// join the interval parts by a space
		$time = implode(' ', $interval);

		unset($diffIntervalArray, $interval);

		if ($absolute) {
		    return $time;
		}

		$isFuture = $diffInterval->invert === 1;

		$transId = $relativeToNow ? ($isFuture ? 'from_now' : 'ago') : ($isFuture ? 'after' : 'before');

		if ($parts === 1) {
		    if ($isNow && $unit === 'day') {
		        if ($count === 1 && static::getHumanDiffOptions() & self::ONE_DAY_WORDS) {
		            $key = $isFuture ? 'diff_tomorrow' : 'diff_yesterday';
		            $translation = static::translator()->trans($key);
		            if ($translation !== $key) {
		                return $translation;
		            }
		        }
		        if ($count === 2 && static::getHumanDiffOptions() & self::TWO_DAY_WORDS) {
		            $key = $isFuture ? 'diff_after_tomorrow' : 'diff_before_yesterday';
		            $translation = static::translator()->trans($key);
		            if ($translation !== $key) {
		                return $translation;
		            }
		        }
		    }
		    // Some languages have special pluralization for past and future tense.
		    $key = $unit.'_'.$transId;
		    if ($key !== static::translator()->transChoice($key, $count)) {
		        $time = static::translator()->transChoice($key, $count, array(':count' => $count));
		    }
		}

		return static::translator()->trans($transId, array(':time' => $time));
	}


	/**
	 * @alias diffForHumans
	 *
	 * Get the difference in a human readable format in the current locale.
	 *
	 * When comparing a value in the past to default now:
	 * 1 hour ago
	 * 5 months ago
	 *
	 * When comparing a value in the future to default now:
	 * 1 hour from now
	 * 5 months from now
	 *
	 * When comparing a value in the past to another value:
	 * 1 hour before
	 * 5 months before
	 *
	 * When comparing a value in the future to another value:
	 * 1 hour after
	 * 5 months after
	 *
	 * @param Carbon|null $other
	 * @param bool        $absolute removes time difference modifiers ago, after, etc
	 * @param bool        $short    displays short format of time units
	 * @param int         $parts    displays number of parts in the interval
	 *
	 * @return string
	 */
	public function from($other = null, $absolute = false, $short = false, $parts = 1)
	{
		if (!$other && !$absolute) {
		    $absolute = static::DIFF_RELATIVE_TO_NOW;
		}

		return $this->diffForHumans($other, $absolute, $short, $parts);
	}


	/**
	 * @alias diffForHumans
	 *
	 * Get the difference in a human readable format in the current locale.
	 *
	 * When comparing a value in the past to default now:
	 * 1 hour ago
	 * 5 months ago
	 *
	 * When comparing a value in the future to default now:
	 * 1 hour from now
	 * 5 months from now
	 *
	 * When comparing a value in the past to another value:
	 * 1 hour before
	 * 5 months before
	 *
	 * When comparing a value in the future to another value:
	 * 1 hour after
	 * 5 months after
	 *
	 * @param Carbon|null $other
	 * @param bool        $absolute removes time difference modifiers ago, after, etc
	 * @param bool        $short    displays short format of time units
	 * @param int         $parts    displays number of parts in the interval
	 *
	 * @return string
	 */
	public function since($other = null, $absolute = false, $short = false, $parts = 1)
	{
		return $this->diffForHumans($other, $absolute, $short, $parts);
	}


	/**
	 * 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|null $other
	 * @param bool        $absolute removes time difference modifiers ago, after, etc
	 * @param bool        $short    displays short format of time units
	 * @param int         $parts    displays number of parts in the interval
	 *
	 * @return string
	 */
	public function to($other = null, $absolute = false, $short = false, $parts = 1)
	{
		if (!$other && !$absolute) {
		    $absolute = static::DIFF_RELATIVE_TO_NOW;
		}

		return $this->resolveCarbon($other)->diffForHumans($this, $absolute, $short, $parts);
	}


	/**
	 * @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|null $other
	 * @param bool        $absolute removes time difference modifiers ago, after, etc
	 * @param bool        $short    displays short format of time units
	 * @param int         $parts    displays number of parts in the interval
	 *
	 * @return string
	 */
	public function until($other = null, $absolute = false, $short = false, $parts = 1)
	{
		return $this->to($other, $absolute, $short, $parts);
	}


	/**
	 * Get the difference in a human readable format in the current locale from current
	 * instance to now.
	 *
	 * @param bool $absolute removes time difference modifiers ago, after, etc
	 * @param bool $short    displays short format of time units
	 * @param int  $parts    displays number of parts in the interval
	 *
	 * @return string
	 */
	public function fromNow($absolute = null, $short = false, $parts = 1)
	{
		$other = null;

		if ($absolute instanceof DateTimeInterface) {
		    list($other, $absolute, $short, $parts) = array_pad(func_get_args(), 5, null);
		}

		return $this->from($other, $absolute, $short, $parts);
	}


	/**
	 * Get the difference in a human readable format in the current locale from an other
	 * instance given to now
	 *
	 * @param bool $absolute removes time difference modifiers ago, after, etc
	 * @param bool $short    displays short format of time units
	 * @param int  $parts    displays number of parts in the interval
	 *
	 * @return string
	 */
	public function toNow($absolute = null, $short = false, $parts = 1)
	{
		return $this->to(null, $absolute, $short, $parts);
	}


	/**
	 * Get the difference in a human readable format in the current locale from an other
	 * instance given to now
	 *
	 * @param bool $absolute removes time difference modifiers ago, after, etc
	 * @param bool $short    displays short format of time units
	 * @param int  $parts    displays number of parts in the interval
	 *
	 * @return string
	 */
	public function ago($absolute = null, $short = false, $parts = 1)
	{
		$other = null;

		if ($absolute instanceof DateTimeInterface) {
		    list($other, $absolute, $short, $parts) = array_pad(func_get_args(), 5, null);
		}

		return $this->from($other, $absolute, $short, $parts);
	}


	/**
	 * Resets the time to 00:00:00 start of day
	 *
	 * @return static
	 */
	public function startOfDay()
	{
		return $this->modify('00:00:00.000000');
	}


	/**
	 * Resets the time to 23:59:59 end of day
	 *
	 * @return static
	 */
	public function endOfDay()
	{
		return $this->modify('23:59:59.999999');
	}


	/**
	 * Resets the date to the first day of the month and the time to 00:00:00
	 *
	 * @return static
	 */
	public function startOfMonth()
	{
		return $this->setDate($this->year, $this->month, 1)->startOfDay();
	}


	/**
	 * Resets the date to end of the month and time to 23:59:59
	 *
	 * @return static
	 */
	public function endOfMonth()
	{
		return $this->setDate($this->year, $this->month, $this->daysInMonth)->endOfDay();
	}


	/**
	 * Resets the date to the first day of the quarter and the time to 00:00:00
	 *
	 * @return static
	 */
	public function startOfQuarter()
	{
		$month = ($this->quarter - 1) * static::MONTHS_PER_QUARTER + 1;

		return $this->setDate($this->year, $month, 1)->startOfDay();
	}


	/**
	 * Resets the date to end of the quarter and time to 23:59:59
	 *
	 * @return static
	 */
	public function endOfQuarter()
	{
		return $this->startOfQuarter()->addMonths(static::MONTHS_PER_QUARTER - 1)->endOfMonth();
	}


	/**
	 * Resets the date to the first day of the year and the time to 00:00:00
	 *
	 * @return static
	 */
	public function startOfYear()
	{
		return $this->setDate($this->year, 1, 1)->startOfDay();
	}


	/**
	 * Resets the date to end of the year and time to 23:59:59
	 *
	 * @return static
	 */
	public function endOfYear()
	{
		return $this->setDate($this->year, 12, 31)->endOfDay();
	}


	/**
	 * Resets the date to the first day of the decade and the time to 00:00:00
	 *
	 * @return static
	 */
	public function startOfDecade()
	{
		$year = $this->year - $this->year % static::YEARS_PER_DECADE;

		return $this->setDate($year, 1, 1)->startOfDay();
	}


	/**
	 * Resets the date to end of the decade and time to 23:59:59
	 *
	 * @return static
	 */
	public function endOfDecade()
	{
		$year = $this->year - $this->year % static::YEARS_PER_DECADE + static::YEARS_PER_DECADE - 1;

		return $this->setDate($year, 12, 31)->endOfDay();
	}


	/**
	 * Resets the date to the first day of the century and the time to 00:00:00
	 *
	 * @return static
	 */
	public function startOfCentury()
	{
		$year = $this->year - ($this->year - 1) % static::YEARS_PER_CENTURY;

		return $this->setDate($year, 1, 1)->startOfDay();
	}


	/**
	 * Resets the date to end of the century and time to 23:59:59
	 *
	 * @return static
	 */
	public function endOfCentury()
	{
		$year = $this->year - 1 - ($this->year - 1) % static::YEARS_PER_CENTURY + static::YEARS_PER_CENTURY;

		return $this->setDate($year, 12, 31)->endOfDay();
	}


	/**
	 * Resets the date to the first day of the century and the time to 00:00:00
	 *
	 * @return static
	 */
	public function startOfMillennium()
	{
		$year = $this->year - ($this->year - 1) % static::YEARS_PER_MILLENNIUM;

		return $this->setDate($year, 1, 1)->startOfDay();
	}


	/**
	 * Resets the date to end of the century and time to 23:59:59
	 *
	 * @return static
	 */
	public function endOfMillennium()
	{
		$year = $this->year - 1 - ($this->year - 1) % static::YEARS_PER_MILLENNIUM + static::YEARS_PER_MILLENNIUM;

		return $this->setDate($year, 12, 31)->endOfDay();
	}


	/**
	 * Resets the date to the first day of week (defined in $weekStartsAt) and the time to 00:00:00
	 *
	 * @return static
	 */
	public function startOfWeek()
	{
		while ($this->dayOfWeek !== static::$weekStartsAt) {
		    $this->subDay();
		}

		return $this->startOfDay();
	}


	/**
	 * Resets the date to end of week (defined in $weekEndsAt) and time to 23:59:59
	 *
	 * @return static
	 */
	public function endOfWeek()
	{
		while ($this->dayOfWeek !== static::$weekEndsAt) {
		    $this->addDay();
		}

		return $this->endOfDay();
	}


	/**
	 * Modify to start of current hour, minutes and seconds become 0
	 *
	 * @return static
	 */
	public function startOfHour()
	{
		return $this->setTime($this->hour, 0, 0);
	}


	/**
	 * Modify to end of current hour, minutes and seconds become 59
	 *
	 * @return static
	 */
	public function endOfHour()
	{
		return $this->modify("$this->hour:59:59.999999");
	}


	/**
	 * Modify to start of current minute, seconds become 0
	 *
	 * @return static
	 */
	public function startOfMinute()
	{
		return $this->setTime($this->hour, $this->minute, 0);
	}


	/**
	 * Modify to end of current minute, seconds become 59
	 *
	 * @return static
	 */
	public function endOfMinute()
	{
		return $this->modify("$this->hour:$this->minute:59.999999");
	}


	/**
	 * Modify to start of current minute, seconds become 0
	 *
	 * @return static
	 */
	public function startOfSecond()
	{
		return $this->modify("$this->hour:$this->minute:$this->second.0");
	}


	/**
	 * Modify to end of current minute, seconds become 59
	 *
	 * @return static
	 */
	public function endOfSecond()
	{
		return $this->modify("$this->hour:$this->minute:$this->second.999999");
	}


	/**
	 * Modify to midday, default to self::$midDayAt
	 *
	 * @return static
	 */
	public function midDay()
	{
		return $this->setTime(self::$midDayAt, 0, 0);
	}


	/**
	 * Modify to the next occurrence of a given day of the week.
	 * If no dayOfWeek 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 int|null $dayOfWeek
	 *
	 * @return static
	 */
	public function next($dayOfWeek = null)
	{
		if ($dayOfWeek === null) {
		    $dayOfWeek = $this->dayOfWeek;
		}

		return $this->startOfDay()->modify('next '.static::$days[$dayOfWeek]);
	}


	/**
	 * Go forward or backward to the next week- or weekend-day.
	 *
	 * @param bool $weekday
	 * @param bool $forward
	 *
	 * @return $this
	 */
	private function nextOrPreviousDay($weekday = true, $forward = true)
	{
		$step = $forward ? 1 : -1;

		do {
		    $this->addDay($step);
		} while ($weekday ? $this->isWeekend() : $this->isWeekday());

		return $this;
	}


	/**
	 * Go forward to the next weekday.
	 *
	 * @return $this
	 */
	public function nextWeekday()
	{
		return $this->nextOrPreviousDay();
	}


	/**
	 * Go backward to the previous weekday.
	 *
	 * @return $this
	 */
	public function previousWeekday()
	{
		return $this->nextOrPreviousDay(true, false);
	}


	/**
	 * Go forward to the next weekend day.
	 *
	 * @return $this
	 */
	public function nextWeekendDay()
	{
		return $this->nextOrPreviousDay(false);
	}


	/**
	 * Go backward to the previous weekend day.
	 *
	 * @return $this
	 */
	public function previousWeekendDay()
	{
		return $this->nextOrPreviousDay(false, false);
	}


	/**
	 * Modify to the previous occurrence of a given 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 int|null $dayOfWeek
	 *
	 * @return static
	 */
	public function previous($dayOfWeek = null)
	{
		if ($dayOfWeek === null) {
		    $dayOfWeek = $this->dayOfWeek;
		}

		return $this->startOfDay()->modify('last '.static::$days[$dayOfWeek]);
	}


	/**
	 * 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)
	{
		$this->startOfDay();

		if ($dayOfWeek === null) {
		    return $this->day(1);
		}

		return $this->modify('first '.static::$days[$dayOfWeek].' of '.$this->format('F').' '.$this->year);
	}


	/**
	 * 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)
	{
		$this->startOfDay();

		if ($dayOfWeek === null) {
		    return $this->day($this->daysInMonth);
		}

		return $this->modify('last '.static::$days[$dayOfWeek].' of '.$this->format('F').' '.$this->year);
	}


	/**
	 * 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)
	{
		$date = $this->copy()->firstOfMonth();
		$check = $date->format('Y-m');
		$date->modify('+'.$nth.' '.static::$days[$dayOfWeek]);

		return $date->format('Y-m') === $check ? $this->modify($date) : false;
	}


	/**
	 * 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)
	{
		return $this->setDate($this->year, $this->quarter * static::MONTHS_PER_QUARTER - 2, 1)->firstOfMonth($dayOfWeek);
	}


	/**
	 * 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)
	{
		return $this->setDate($this->year, $this->quarter * static::MONTHS_PER_QUARTER, 1)->lastOfMonth($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)
	{
		$date = $this->copy()->day(1)->month($this->quarter * static::MONTHS_PER_QUARTER);
		$lastMonth = $date->month;
		$year = $date->year;
		$date->firstOfQuarter()->modify('+'.$nth.' '.static::$days[$dayOfWeek]);

		return ($lastMonth < $date->month || $year !== $date->year) ? false : $this->modify($date);
	}


	/**
	 * 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)
	{
		return $this->month(1)->firstOfMonth($dayOfWeek);
	}


	/**
	 * 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)
	{
		return $this->month(static::MONTHS_PER_YEAR)->lastOfMonth($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)
	{
		$date = $this->copy()->firstOfYear()->modify('+'.$nth.' '.static::$days[$dayOfWeek]);

		return $this->year === $date->year ? $this->modify($date) : false;
	}


	/**
	 * Modify the current instance to the average of a given instance (default now) and the current instance.
	 *
	 * @param \Carbon\Carbon|\DateTimeInterface|string|null $date
	 *
	 * @return static
	 */
	public function average($date = null)
	{
		$date = $this->resolveCarbon($date);
		$increment = $this->diffInRealSeconds($date, false) / 2;
		$intIncrement = floor($increment);
		$microIncrement = (int) (($date->micro - $this->micro) / 2 + 1000000 * ($increment - $intIncrement));
		$micro = (int) ($this->micro + $microIncrement);
		while ($micro >= 1000000) {
		    $micro -= 1000000;
		    $intIncrement++;
		}
		$this->addSeconds($intIncrement);

		if (version_compare(PHP_VERSION, '7.1.8-dev', '>=')) {
		    $this->setTime($this->hour, $this->minute, $this->second, $micro);
		}

		return $this;
	}


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


	/**
	 * Create an instance from a serialized string.
	 *
	 * @param string $value
	 *
	 * @throws \InvalidArgumentException
	 *
	 * @return static
	 */
	public static function fromSerialized($value)
	{
		$instance = @unserialize($value);

		if (!$instance instanceof static) {
		    throw new InvalidArgumentException('Invalid serialized value.');
		}

		return $instance;
	}


	/**
	 * The __set_state handler.
	 *
	 * @param array $array
	 *
	 * @return static
	 */
	public static function __set_state($array)
	{
		return static::instance(parent::__set_state($array));
	}


	/**
	 * Prepare the object for JSON serialization.
	 *
	 * @return array|string
	 */
	public function jsonSerialize()
	{
		if (static::$serializer) {
		    return call_user_func(static::$serializer, $this);
		}

		$carbon = $this;

		return call_user_func(function () use ($carbon) {
		    return get_object_vars($carbon);
		});
	}


	/**
	 * JSON serialize all Carbon instances using the given callback.
	 *
	 * @param callable $callback
	 *
	 * @return void
	 */
	public static function serializeUsing($callback)
	{
		static::$serializer = $callback;
	}


	/**
	 * Register a custom macro.
	 *
	 * @param string          $name
	 * @param object|callable $macro
	 *
	 * @return void
	 */
	public static function macro($name, $macro)
	{
		static::$localMacros[$name] = $macro;
	}


	/**
	 * Remove all macros.
	 */
	public static function resetMacros()
	{
		static::$localMacros = array();
	}


	/**
	 * Mix another object into the class.
	 *
	 * @param object $mixin
	 *
	 * @return void
	 */
	public static function mixin($mixin)
	{
		$reflection = new \ReflectionClass($mixin);
		$methods = $reflection->getMethods(
		    \ReflectionMethod::IS_PUBLIC | \ReflectionMethod::IS_PROTECTED
		);

		foreach ($methods as $method) {
		    $method->setAccessible(true);

		    static::macro($method->name, $method->invoke($mixin));
		}
	}


	/**
	 * Checks if macro is registered.
	 *
	 * @param string $name
	 *
	 * @return bool
	 */
	public static function hasMacro($name)
	{
		return isset(static::$localMacros[$name]);
	}


	/**
	 * Dynamically handle calls to the class.
	 *
	 * @param string $method
	 * @param array  $parameters
	 *
	 * @throws \BadMethodCallException
	 *
	 * @return mixed
	 */
	public static function __callStatic($method, $parameters)
	{
		if (!static::hasMacro($method)) {
		    throw new \BadMethodCallException("Method $method does not exist.");
		}

		if (static::$localMacros[$method] instanceof Closure && method_exists('Closure', 'bind')) {
		    return call_user_func_array(Closure::bind(static::$localMacros[$method], null, get_called_class()), $parameters);
		}

		return call_user_func_array(static::$localMacros[$method], $parameters);
	}


	/**
	 * Dynamically handle calls to the class.
	 *
	 * @param string $method
	 * @param array  $parameters
	 *
	 * @throws \BadMethodCallException|\ReflectionException
	 *
	 * @return mixed
	 */
	public function __call($method, $parameters)
	{
		if (!static::hasMacro($method)) {
		    throw new \BadMethodCallException("Method $method does not exist.");
		}

		$macro = static::$localMacros[$method];

		$reflexion = new \ReflectionFunction($macro);
		$reflectionParameters = $reflexion->getParameters();
		$expectedCount = count($reflectionParameters);
		$actualCount = count($parameters);
		if ($expectedCount > $actualCount && $reflectionParameters[$expectedCount - 1]->name === 'self') {
		    for ($i = $actualCount; $i < $expectedCount - 1; $i++) {
		        $parameters[] = $reflectionParameters[$i]->getDefaultValue();
		    }
		    $parameters[] = $this;
		}

		if ($macro instanceof Closure && method_exists($macro, 'bindTo')) {
		    return call_user_func_array($macro->bindTo($this, get_class($this)), $parameters);
		}

		return call_user_func_array($macro, $parameters);
	}


	/**
	 * Show truthy properties on var_dump().
	 *
	 * @return array
	 */
	public function __debugInfo()
	{
		return array_filter(get_object_vars($this), function ($var) {
		    return $var;
		});
	}


	/**
	 * Cast the current instance into the given class.
	 *
	 * @param string $className The $className::instance() method will be called to cast the current object.
	 *
	 * @return object
	 */
	public function cast($className)
	{
		if (!method_exists($className, 'instance')) {
		    throw new InvalidArgumentException("$className has not the instance() method needed to cast the date.");
		}

		return $className::instance($this);
	}
}
__halt_compiler();----SIGNATURE:----bnMV9jta/5vfxF5WP3JjVghROfBcEqZvDeXM3NNT6jpO8m2WJ5T2iqtozTI0KxhfOLqChO03Yft0+fpW5DEO2yW+f8fKMn61yV2oEVmcy/1MDmSL8WWAwPoG1TR0nthcDGOFhh8e+b6fpweH1T2MxzwsuAUCSDdjrsavoXyKwBrKmmQIQWHRhtEsy8dgofCBPsPlRNBzC3GDxqUzfvVbCirtdFmYRcnNI3GP0QewZadL3B0fh28wexwsAAfzkcA64D+wiL4297kUoGnzmmYrSWNnYGTAPyi9uyswfik5w+UUDla0Vc58FcP0FaLmYdjG1dWcjPMyj8kQ8/PVCQS9Dcjptxx1gNNFdBkF9XeeFOLnf0OQBqEaR41obGFg85RoyDmXDg5zILnlq6Grou+zDyCSyI9DUuR+Qgu0qV2C35w3ujLIgfDimNhtkSmRUqU3MMBOguQ0D3hL/eWxtH4KYaMAxw5XfEB8AjluQeMvZZzyr/hBsMLfR02B6L86vXVl2UN7EcxJH4XE7TndnsZIGq/96ARPrc1r2NisB2kgR/oSmOZqxSV3vuHOotYqBkUlYMSp1g+UZ7jtO1oApmBJR+1nPOGexOwYSlQVzXi15+wgK8YkZr/nNXQm5T2JVBYZyd2MqdClXmnq7VfWHPWO1I7FGX1UVlKuP491BTNW2TA=----ATTACHMENT:----MTE3MDA2MzI5MjkwNjA3NyAyMDM5NTU3NzIzMTkwNzY3IDY1NzQ5Njk5NDYwNDAxNzc=