code: @Override
  	public boolean isBusinessday(LocalDate date) {
  		return	(baseCalendar == null || baseCalendar.isBusinessday(date))
  				&& date.getDayOfWeek() != DayOfWeek.SATURDAY
  				&& date.getDayOfWeek() != DayOfWeek.SUNDAY;
  	}
docs: /* (non-Javadoc)
  @see net.finmath.time.BusinessdayCalendarInterface#isBuisinessday(java.util.Calendar)