On Fri, 17 Jul 2026 at 10:24, James Bellaire via tz <[email protected]> wrote:

> On 7/17/2026 9:33 AM, Arthur Olson via tz wrote:
> > Rather than choosing between EST and EDT going forward: EPDT (for
> > Eastern Permanent Daylight Time).
>
> One benefit of using "EDT" going forward (beyond the RFC 822 and GNU
> issues discussed) is that it would serve as a reminder that the area is
> already on "permanent DST".


It at least beats "EđŸ˜”â€đŸ’«T" which, while disallowed, might better reflect
how some would inevitably feel about all this.  ;)


> Humor aside, the US proposal clearly states the official names will be
> "standard time". Several provinces in Canada were willing to to move in
> coordination with the United States. Yukon decided not to wait for BC
> and the US in 2020 and BC gave up on waiting for the US earlier this
> year. I expect that if the US proposal passes it won't be long until the
> Canadian provinces synchronize.


Ontario's 2020 legislation was passed with the (admittedly nonbinding)
understanding that it only be activated if both Québec and New York went
ahead, too.  The US change going through would create pressure for the rest
of Canada to follow suit, sure, but I wouldn't assume Canada would go along
automatically, quickly, or even at all — especially if the ultimate
decision point drags well into the fall.

On Fri, 17 Jul 2026 at 10:51, Doug Ewell via tz <[email protected]> wrote:

> Therefore, there is no “permanent DST”; there is *removal* of DST combined
> with a redefinition of standard time.


Legally, that is more correct according to the bill as currently written.
And that would align with our typical practice of modeling such
arrangements with tm_isdst=0 (at least in the long-term, modulo near-term
CLDR considerations).  Of course, if it ultimately ends up being a
shorter-term experiment *Ă  la* 1974 rather than the "permanent" change
that's intended, that could all get re-evaluated, too.

--
Tim Parenti

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