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wp_checkdate( int $month, int $day, int $year, string $source_date )

Test if the supplied date is valid for the Gregorian calendar.

Description

Parameters

$month

(int) (Required) Month number.

$day

(int) (Required) Day number.

$year

(int) (Required) Year number.

$source_date

(string) (Required) The date to filter.

Return

(bool) True if valid date, false if not valid date.

Source

File: wp-includes/functions.php

function wp_checkdate( $month, $day, $year, $source_date ) {
	/**
	 * Filters whether the given date is valid for the Gregorian calendar.
	 *
	 * @since 3.5.0
	 *
	 * @param bool   $checkdate   Whether the given date is valid.
	 * @param string $source_date Date to check.
	 */
	return apply_filters( 'wp_checkdate', checkdate( $month, $day, $year ), $source_date );
}

Changelog

Version Description
3.5.0 Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/wp_checkdate