public static LabelValueChoiceRenderer<Long> getDatumChoiceRenderer(final int lastNDays) {
   final LabelValueChoiceRenderer<Long> datumChoiceRenderer = new LabelValueChoiceRenderer<Long>();
   for (int i = 0; i > -lastNDays; i--) {
     final DayHolder day = new DayHolder();
     day.add(Calendar.DAY_OF_YEAR, i);
     datumChoiceRenderer.addValue(
         day.getSQLDate().getTime(),
         DateTimeFormatter.instance()
             .getFormattedDate(
                 day.getSQLDate(), DateFormats.getFormatString(DateFormatType.DATE)));
   }
   return datumChoiceRenderer;
 }