GWT based year calendar showing a date range

    final DateTimeFormat format = DateTimeFormat.getFormat("yyyy-M-dd");
    final DateTimeFormat monthFormat = DateTimeFormat.getFormat("MMMM");

    final FlexTable flexTable = new FlexTable();

    final DatePicker[] datePickers = new DatePicker[12];

    class MyDatePicker extends DatePicker {

      MyDatePicker() {
        super(new DefaultMonthSelector(), new DefaultCalendarView(),
            new CalendarModel() {
              @Override
              public String formatCurrentMonth() {
                return monthFormat.format(getCurrentMonth());
              }
            });
      }
    }

    for (int row = 0; row < 4; row ++) {
      for (int col = 0; col < 3; col ++) {

        final DatePicker datePicker = new MyDatePicker();

        final int monthZeroBased = (row * 3) + col;
        datePicker.setCurrentMonth(format.parse("2012-" + (monthZeroBased + 1) + "-01"));
        datePicker.addStyleName("my-cal");

        flexTable.setWidget(row, col, datePicker);
        datePickers[monthZeroBased] = datePicker;
      }
    }



    final Date start = format.parse("2012-01-17");
    final Date end = format.parse("2012-03-28");

    for (final Date date = start; date.compareTo(end) <= 0; CalendarUtil
        .addDaysToDate(date, 1)) {


      @SuppressWarnings("deprecation") /* Yes, it's deprecated */
      final int month = date.getMonth();

      datePickers[month].addStyleToDates("my-green", date);
    }