seconds example

$title = t('Hour');
          break;

        case 'minute':
          $format = 'i';
          $options = $date_helper->minutes($format, $element['#required'], $element['#date_increment']);
          $title = t('Minute');
          break;

        case 'second':
          $format = 's';
          $options = $date_helper->seconds($format, $element['#required'], $element['#date_increment']);
          $title = t('Second');
          break;

        case 'ampm':
          $format = 'a';
          $options = $date_helper->ampm($element['#required']);
          $title = t('AM/PM');
          break;

        default:
          $format = '';