Being that I’m a senior controller on the VATSIM network, I have to work with Zulu time (also known as UTC or GMT) all the time so I set up an additional clock to be shown on my Vista x64 machine only to find out it’s off by one hour.
At first I thought it was a problem when my time zone change from Mountain Standard Time to Mountain Daylight Time but those settings were (are) fine.
As it turns out, what in Vista exists as GMT is actually local London time which, as you may know, changes seasonally at the same general time as the US daylight saving time changes (note: Daylight Saving Time, not Daylight Savings Time).
Why Vista’s programmers have a GMT setting which changes time zones borders on stupidity. GMT is GMT is UTC is Zulu is GMT. It never changes. What they should have done is to have a separate time zone for GMT not related to London local time which right now is BST (British Summer Time).
I had to use the Time Zone Edit utility to change GMT not to allow daylight saving time. I wonder sometimes why I continue to use this bloody OS.
