@Test
public void toLabel_dow() throws ParseException {

	Date start =  new SimpleDateFormat("E yyyy/MM/dd z HH:mm:ss").parse("Tue 2011/05/09 EST 24:00:00");
	Date expect =  new SimpleDateFormat("E yyyy/MM/dd z HH:mm:ss").parse("Wed 2011/05/10 EST 24:00:00");
	System.out.println(new SimpleDateFormat("E yyyy/MM/dd z HH:mm:ss").format(expect));
	assertEquals(expect, DateUtils.addTime(start, Calendar.DAY_OF_WEEK, 1));
}