I'll be blunter.Microsoft lists TIME ZONES (those things composed of
daylight saving - so two places on the same longitude may have different
timezones) not names of times. GMT always = GMT = UTC (well to microseconds
or something anyway)
"pbx" <pbeisel@gmail.com> wrote in message
news:1175122691.750381.213220@e65g2000hsc.googlegroups.com...
> On Mar 28, 1:22 pm, <.> wrote:
>> Technically windows does not use GMT (working out the time by looking at
>> stars etc). It uses UTC which is atomic clocks. The label of the time
>> changes with Daylight Saving. Windows does not use the label except in
>> some
>> americian time zones. We just changed from AEDT to AEST."pbx"
>> <pbei...@gmail.com> wrote in message
>>
>> news:1175112743.763933.149210@e65g2000hsc.googlegroups.com...
>>
>>
>>
>> > On Mar 28, 10:57 am, "Tom Porterfield" <tppor...@mvps.org> wrote:
>> >> pbx wrote:
>> >> > Vista seems confused about what GMT is:
>>
>> >> > my date/time is 3/27/2007 5:14PM in GMT -8 Pacific Time (US &
>> >> > Canada)
>>
>> >> > if I set the additional clock to both available GMTs:
>>
>> >> > GMT (Greenwich Mean Time: Dublin, Edinburgh, Lisbon, London)
>> >> > and
>> >> > GMT (Casablanca, Monrovia, Reykjavik)
>>
>> >> > the first one (london) says its: 3/28/2007 1:14AM
>>
>> >> > the second one (casablanca) says its: 3/28/2007 12:14AM
>>
>> >> > the second one is right!
>>
>> >> Actually they are both right but you have to understand what you are
>> >> seeing.
>> >> Pacific Time (GMT-8) is currently in daylight savings time meaning you
>> >> are
>> >> actually currently GMT-7. True GMT (Greenwich Mean Time) does not
>> >> have a
>> >> concept of daylight savings time so GMT-8 is always GMT-8 even if when
>> >> adjusted it is GMT-7. Casablanca is not true GMT and while Casablanca
>> >> does
>> >> not change its clock for daylight savings time, any conversion from
>> >> local
>> >> time where DST is in effect does need to be accounted for and Windows
>> >> does
>> >> this automacitally for you. To see the correct time for true
>> >> Greenwich
>> >> Mean
>> >> Time you need to set that as your timezone AND disable the automatic
>> >> adjustment for daylight savings time.
>> >> --
>> >> Tom Porterfield- Hide quoted text -
>>
>> >> - Show quoted text -
>>
>> > Tom--
>>
>> > that's a pretty good explanation but...
>>
>> > are saying that GMT is now +1 in London because London "sprang
>> > forward" to summer time.
>>
>> > but then is:
>>
>> >http://wwp.greenwichmeantime.com/
>>
>> > wrong?
>>
>> > is there no absolute concept of GMT? http://wwp.greenwichmeantime.com/
>> > matches the Casablanca setting.
>> > Also the .NET Framework 2.0 (DateTime.UtcNow) running on the same
>> > Vista machine reports GMT to match the Casablanca setting.
>>
>> > seems to me that GMT is GMT and London is now +1 GMT... so if the
>> > Vista setting was London it would be correct... but it starts off
>> > saying that its GMT (or is GMT <> UTC?)
>>
>> > chime in all (pun intended).- Hide quoted text -
>>
>> - Show quoted text -
>
> seems to me that GMT should not be shown as a "varying" time based on
> daylight savings/summer time, but should always match UTC.
> if Microsoft doesn't think this is a bug, then i would suggest that
> they add a UTC option to the clocks timezone so those of us who want
> to know UTC aka "GMT" can set the clock to it.
>