Force all events to display as All Day Events

// Snippet now hosted here: https://gist.github.com/elimn/b57ef3d39837d8c6af45

add_filter('tribe_event_is_all_day', 'all_day_enforced_field');

function all_day_enforced_field ($output ) {

        if ( !is_admin() && tribe_is_event() ) {
                $output = true;
        }

        return $output;
}