--TEST-- Test for setting Date/Time during a forward DST transition --FILE-- setTime(2, 0)->format('Y-m-d H:i:s T/e - U') . "\n"; $date = new DateTime('2020-03-08 01:30:00'); echo $date->setTime(2, 30)->format('Y-m-d H:i:s T/e - U') . "\n"; $date = new DateTime('2020-03-08 01:30:00'); echo $date->setTime(3, 0)->format('Y-m-d H:i:s T/e - U') . "\n"; $date = new DateTime('2020-03-08 01:30:00'); echo $date->setTime(1, 59, 59)->format('Y-m-d H:i:s T/e - U') . "\n"; ?> --EXPECT-- 2020-03-08 03:00:00 CDT/America/Chicago - 1583654400 2020-03-08 03:30:00 CDT/America/Chicago - 1583656200 2020-03-08 03:00:00 CDT/America/Chicago - 1583654400 2020-03-08 01:59:59 CST/America/Chicago - 1583654399