WordPress at a glance
filter is not described

the_modified_time filter-hook . WP 2.0.0

Filters the localized time a post was last modified, for display.

Usage

add_filter( 'the_modified_time', 'filter_function_name_3268', 10, 2 );
function filter_function_name_3268( $get_the_modified_time, $d ){
	// filter...

	return $get_the_modified_time;
}
$get_the_modified_time(string)
The formatted time.
$d(string)
The time format. Accepts 'G', 'U', or php date format.
Default: value specified in 'time_format' option

Where the hook is called

the_modified_time()
the_modified_time
wp-includes/general-template.php 2463
echo apply_filters( 'the_modified_time', get_the_modified_time($d), $d );

Where the hook is used (in WP core)

Does not used.