Carview!

Used by	Description
wp_resolve_post_date()`wp-includes/post.php`	Uses wp_checkdate to return a valid Gregorian-calendar value for post_date.
wp_validate_site_data()`wp-includes/ms-site.php`	Validates data for a site prior to inserting or updating in the database.
WP_Date_Query::validate_date_values()`wp-includes/class-wp-date-query.php`	Validates the given date_query values and triggers errors if something is not valid.
_wp_translate_postdata()`wp-admin/includes/post.php`	Renames `$_POST` data from form names to DB post columns.
WP_Customize_Manager::save()`wp-includes/class-wp-customize-manager.php`	Handles customize_save WP Ajax request to save/update a changeset.
WP_Query::parse_query()`wp-includes/class-wp-query.php`	Parses a query string and sets query type booleans.
redirect_canonical()`wp-includes/canonical.php`	Redirects incoming links to the proper URL based on the site url.

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