WordPress at a glance
filter is not described

get_calendar filter-hook . WP 1.0

This filter is documented in wp-includes/general-template.php

Usage

add_filter( 'get_calendar', 'filter_function_name_2198' );
function filter_function_name_2198( $cache[ $key ] ){
	// filter...

	return $cache[ $key ];
}
$cache[ $key ]
-

Where the hook is called

get_calendar()
get_calendar
wp-includes/general-template.php 2197
$output = apply_filters( 'get_calendar', $cache[ $key ] );
wp-includes/general-template.php 2404
echo apply_filters( 'get_calendar', $calendar_output );
wp-includes/general-template.php 2408
return apply_filters( 'get_calendar', $calendar_output );

Where in WP core the hook is used WordPress

Usage not found.