"Olson, Arthur David \(NIH/NCI\) [E]" <olsona@dc37a.nci.nih.gov> writes:
We cahnged time to 01:55 , 4 Nov 2007. The time advances normally from 02:00hrs on and "does not fall back to 01:00hrs as desired".
My guess is that you set the time to the _second_ 01:55 on that date. So the clock _should_ advance normally through 02:00. If you want to observe a jump, you have to set the time to the _first_ 01:55 on that date.
# date Sun Nov 4 02:01:23 EST 2007
So far so good; that's a valid time stamp.
# zdump -v US/Alaska | grep 2007 US/Alaska Sat Nov 3 23:05:42 2007 AKDT US/Alaska Sun Mar 11 10:59:59 2007 GMT = Sun Mar 11 01:59:59 2007 AKST isdst=0 gmtoff=-32400 US/Alaska Sun Mar 11 11:00:00 2007 GMT = Sun Mar 11 03:00:00 2007 AKDT isdst=1 gmtoff=-28800 US/Alaska Sun Nov 4 09:59:59 2007 GMT = Sun Nov 4 01:59:59 2007 AKDT isdst=1 gmtoff=-28800 US/Alaska Sun Nov 4 10:00:00 2007 GMT = Sun Nov 4 01:00:00 2007 AKST isdst=0 gmtoff=-32400
This is also valid behavior; the clock jumps backward just before 02:00 on 2007-11-04. Your example for Yukon was similar. So far, I don't see a bug.