public static boolean isWeekend(Date date) {
		final Week week = dayOfWeekEnum(date);
		return Week.SATURDAY == week || Week.SUNDAY == week;
	}
@Test
	public void isWeekendTest() {
		DateTime parse = DateUtil.parse("2021-07-28");
		assertFalse(DateUtil.isWeekend(parse));

		parse = DateUtil.parse("2021-07-25");
		assertTrue(DateUtil.isWeekend(parse));
		parse = DateUtil.parse("2021-07-24");
		assertTrue(DateUtil.isWeekend(parse));
	}