    @Test
    public void testZeroYearAndEndFrag() throws Exception {

        String s4 = "-0001-12-31T24:00:00Z";
        DateTime dt4 = DateUtility.parseXSDDateTime(s4);
        String s5 = "0000-01-01T00:00:00Z";
        DateTime dt5 = DateUtility.parseXSDDateTime(s5);
        assertTrue(dt4.isEqual(dt5));
    }