[tz] Yukon to move to year-round PDT

[Brian Inglis]

On 2020-03-09 14:46, Paul Eggert wrote:
> On 3/9/20 1:24 PM, Brian Inglis wrote:
>> Current official practice seems to be to use daylight saving time zone names in
>> summer, and standard time zone names in winter.
> 
> Are you saying that people in Dawson Creek, Ft Nelson and Creston consistently
> say that they observe PDT in winter and MST in summer? My impression is that
> they don't much care what you call it, so long as you get the right clock
> setting. The press release announcing the 2015 for Fort Nelson
> <https://www.northernrockies.ca/assets/Home/Press~Releases/NRRM_Time_Change_Press_Release%202.pdf>,
> for example, says "The Northern Rockies Regional Municipality has resolved to
> remain on Mountain Standard Time (Pacific Daylight Time) throughout the entire
> year".

That seems to be the official *federal* position as in:

https://nrc.canada.ca/en/certifications-evaluations-standards/canadas-official-time/time-zones-daylight-saving-time

and if they update those maps, Winter Time Zones will show Yukon (and possibly
adjacent arctic areas) in yellow.

> As I see it, the options compatible with current POSIX are the equivalent of:
> 
> * TZ='MST7' (MST all year, as standard time)
> 
> * TZ='PDT7' (PDT all year, as standard time)
> 
> * TZ='MST7PDT7,M3.2.0,M11.1.0' (MST in winter as standard time, PDT in summer as
> daylight saving time, and both are UTC -7)
> 
> None of these are entirely satisfactory. The first option is what we've been
> using in Dawson Creek etc., which is why it's in the draft tzdata now for Yukon.

As I said we don't seem to have heard from any locals in variant areas about
actual practices.

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

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