WordPress at a glance
filter is not described

date_rewrite_rules filter-hook . WP 1.5.0

Filters rewrite rules used for date archives.

Likely date archives would include /yyyy/, /yyyy/mm/, and /yyyy/mm/dd/.

Usage

add_filter( 'date_rewrite_rules', 'filter_function_name_5483' );
function filter_function_name_5483( $date_rewrite ){
	// filter...

	return $date_rewrite;
}
$date_rewrite(array)
The rewrite rules for date archives.

Where the hook is called

WP_Rewrite::rewrite_rules()
wp-includes/class-wp-rewrite.php 1271
$date_rewrite = apply_filters( 'date_rewrite_rules', $date_rewrite );

Where the hook is used (in WP core)

Does not used.