End Date Blank
$meta_query = array( array( array( 'key' => 'event_information_event_details_event_date_end_date', 'compare' => '=', ), ), array( 'key' => 'event_information_event_details_event_date_end_date', 'value' => '$current_date', 'compare' => '>=', 'type' => 'DATE', ), );