Bill Moseley wrote: >Why can't I truncate to the month? Because 2016-04-01T00:00:00 didn't exist in Asia/Amman. Its DST rules include a switch from winter time to summer time at 24:00 on the last Thursday in March. This has the effect of skipping the hour from 00:00 to 01:00 on some Friday morning. This year the last Thursday in March was the last day in March, so the affected Friday was the first day of April.
-zefram
