On 2026-09-28 17:21, James Bellaire via tz wrote:
On 9/28/2026 6:57 PM, Tim Parenti via tz wrote:
From CBC Calgary, 4 September 2026. Some business owners in Alberta are
starting to notice disruptions and discrepancies in their digital calendar and
booking apps:
https://www.cbc.ca/news/canada/calgary/alberta-permanent-daylight-savings-
businesses-calendars-9.7331872
One business owner said "[t]his feels like a secret Y2K that we're not ready
for, I think."
Those on this list will know that these discrepancies are handled in a range
of application-specific ways which are often not transparent to the end-user,
and that neither applications nor standards really contemplate or allow for
the definition of expected behavior when zone definitions change. As such,
these issues tend to crop up anytime a timekeeping change is implemented with
any less notice than the typical leadtime with which folks are booking
appointments.
The article mentions tz's role but misstates the date of release for 2026c,
which contained Alberta's change, as 7 August instead of 8 July.
"(UTC-07:00) Pacific Time (British Columbia)" and "(UTC-06:00) Mountain Time
(Alberta)" have now appeared in my install of Windows 11 (25H2). Perhaps life is
better at the end of September than it was at the beginning.
I'm hoping to see reg changes in W10 on the coming Patch Tuesday: good to know
what to look for.
Who knows if MB will make it without an extra patch slot D change 2 weeks later?
Anyone know what's the status from the folks at Apple and Oracle?
I posted to Thunderbird developers about needing to get the CLDR 49/ICU 79
changes coming 2026-10-21 built, tested, and released, including ESR, ASAP!
They seemed to think they were already on it, so we will see what they can
manage in time.
--
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
