if (isset($_REQUEST['teardown_end_date']) && $_REQUEST['teardown_end_date'] != '') {
      if (DateTime::createFromFormat("Y-m-d", trim($_REQUEST['teardown_end_date']))) {
        $teardown_end_date = DateTime::createFromFormat("Y-m-d", trim($_REQUEST['teardown_end_date']))->getTimestamp();
      } else {
        $ok = false;