apply_filters( ‘wp_checkdate’, bool $checkdate, string $source_date )

Filters whether the given date is valid for the Gregorian calendar.

Parameters

return apply_filters( 'wp_checkdate', checkdate( $month, $day, $year ), $source_date );

Used by	Description
wp_checkdate()`wp-includes/functions.php`	Tests if the supplied date is valid for the Gregorian calendar.

Version	Description
3.5.0	Introduced.

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