--TEST-- Bug #35699 (date() can't handle leap years before 1970) --FILE-- <?php date_default_timezone_set("UTC"); echo date(DATE_ISO8601, strtotime('1964-06-06')), "\n"; echo date(DATE_ISO8601, strtotime('1963-06-06')), "\n"; echo date(DATE_ISO8601, strtotime('1964-01-06')), "\n"; ?> --EXPECT-- 1964-06-06T00:00:00+0000 1963-06-06T00:00:00+0000 1964-01-06T00:00:00+0000