public boolean isInvalid(Date date) {
		calendar2.setTime(date);
		for (int i = 4; i < 6; i++) {
			if (calendar.get(Calendar.MONTH) == calendar2.get(Calendar.MONTH)
					&& calendar.get(Calendar.DAY_OF_MONTH) == calendar2
					.get(Calendar.DAY_OF_MONTH) + i) {
				return true;
			}
		}
		return false;
	}