@Test
public void toLabel_year() throws ParseException {

	Date start =  new SimpleDateFormat("yyyy/MM/dd z HH:mm:ss").parse("2011/05/09 EST 05:00:00");
	Date expect =  new SimpleDateFormat("yyyy/MM/dd z HH:mm:ss").parse("2012/05/09 EST 05:00:00");
	assertEquals(expect, DateUtils.addTime(start, Calendar.YEAR, 1));
}