[root@ root]# date -d '2002-03-31 01:59:59 UTC' +%s 1017539999 [root@ root]# date -d '2002-03-31 02:00:00 UTC' +%s 1017536400 timestamp = prev_timestamp - 3599 ?? Back
to the Future ?? [root@ root]# date -d '2002-03-31 03:00:00 UTC' +%s 1017543600 timestamp = prev_timestamp + 7200 ?? Hmmm... ------------------------ [root@ root]# date -u -d '1970-01-01 1017539999 sec' Sun Mar 31 01:59:59 UTC 2002 [root@ root]# date -u -d '1970-01-01 1017540000 sec' Sun Mar 31 02:00:00 UTC 2002 02:00:00 not exist time [root@ root]# date -u -d '1970-01-01 1017543600 sec' Sun Mar 31 03:00:00 UTC 2002