On 2026-08-07 09:09, Tim Parenti via tz wrote:
On Fri, 7 Aug 2026 at 10:33, James Bellaire via tz <[email protected]
<mailto:[email protected]>> wrote:
Microsoft's blog has announced changes to support the time zone changes in
British Columbia and Alberta.
I had been starting to wonder when they would get to that.
Remaining versions of Windows will receive the update as part of October
2026 monthly quality update."
Worth noting that October's "Patch Tuesday" is 13 October 2026, less than three
weeks before these changes take effect. Additionally, only a handful of LTS
releases of Windows 10 continue to enjoy support:
https://endoflife.date/windows <https://endoflife.date/windows>
As workarounds on unsupported versions, users in British Columbia can select
Arizona for year-round UTC−7, while those in Alberta can select Saskatchewan for
year-round UTC−6.
On Fri, 7 Aug 2026 at 10:48, Robert Bastian via tz <[email protected]
<mailto:[email protected]>> wrote:
Clocks will not be advanced by an hour at 12:00 a.m. on November 01,
2026, for the British Columbia time zone.
Yes, they won't be advanced, but they also won't be turned back, which is
really the more important part.
That is indeed quite an unfortunate error for as long as the guidance took to
prepare.
Not the only error, as no Canadian time zones are advanced at midnight: they
change(d) +/- at 02.00 local in each time zone!
$ zdump -Vc2026,2027 America/Vancouver
America/Vancouver Sun Mar 8 09:59:59 2026 UT = Sun Mar 8 01:59:59 2026 PST
isdst=0 gmtoff=-28800
America/Vancouver Sun Mar 8 10:00:00 2026 UT = Sun Mar 8 03:00:00 2026 PDT
isdst=1 gmtoff=-25200
America/Vancouver Sun Nov 1 08:59:59 2026 UT = Sun Nov 1 01:59:59 2026 PDT
isdst=1 gmtoff=-25200
America/Vancouver Sun Nov 1 09:00:00 2026 UT = Sun Nov 1 02:00:00 2026 MST
isdst=0 gmtoff=-25200
$ zdump -Vc2026,2027 America/Edmonton
America/Edmonton Sun Mar 8 08:59:59 2026 UT = Sun Mar 8 01:59:59 2026 MST
isdst=0 gmtoff=-25200
America/Edmonton Sun Mar 8 09:00:00 2026 UT = Sun Mar 8 03:00:00 2026 MDT
isdst=1 gmtoff=-21600
America/Edmonton Sun Nov 1 07:59:59 2026 UT = Sun Nov 1 01:59:59 2026 MDT
isdst=1 gmtoff=-21600
America/Edmonton Sun Nov 1 08:00:00 2026 UT = Sun Nov 1 02:00:00 2026 CST
isdst=0 gmtoff=-21600
What boggles my mind is that rather than ending DST, we are effectively doubling
it, as we enter winter in arctic territories!
[In previous years, around the time changes, we would be driving into the sun
low above the horizon (when skies are clear; and half the time) for about an
hour morning and evening, from about a month before and also after the time
changes; now we will have to pay attention to sunrise and sunset times to know
when we and others may be dazzled while driving.]
--
Take care. Thanks, Brian Inglis Calgary, Alberta, Canada
La perfection est atteinte Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter not when there is no more to add
mais lorsqu'il n'y a plus rien à retrancher but when there is no more to cut
-- Antoine de Saint-Exupéry
