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Countdown Timer with Offset

This is a countdown timer that actually counts down to 15:15. However, it should display that it is actually counting down to 16:15. so an offset of + 1 hours.

So how is this done?
As of T(-) Countdown Control version 1.8.9 the target can be filtered with an offset by adding the following to the child-theme functions.php file:

add_filter( 'countdown_offset', 'my_offset', 10, 2 );
function my_offset( $id, $target_time ) {
if($id == '3411'){
$target_time = $target_time + (1 * 60 * 60);
return $target_time;