Tutorial :TzSpecificLocalTimeToSystemTime during DT -< ST transition


It seems to me there is some ambiguity during the transition between Daylight time to Standard time for example in the US at 2:00 AM DT on 11/1 Daylight time ended and Standard time began the time now being 1:00 AM ST. This means that a time of 1:30 is meaningless unless it is qualified as ST or DT. So, how can TzSpecificLocalTimeToSystemTime convert this time?


It can guess, at best. Since SYSTEMTIME structure lacks DST bit, there are indeed inherently ambiguous periods.


Raymond Chen wrote about this topic, hopefully that post will clear things up.

Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
Next Post »