code: public void addExcludedDate (final Date excludedDate)
    {
      final Date date = getStartOfDayJavaCalendar (excludedDate.getTime ()).getTime ();
      /*
       * System.err.println( "HolidayCalendar.add(): date=" +
       * excludedDate.toLocaleString());
       */
      m_aDates.add (date);
    }
docs: <p>
  Add the given Date to the list of excluded days. Only the month, day and
  year of the returned dates are significant.
  </p>