[tz] Yukon to move to year-round PDT

[Chris Walton]

I agree with Michael D.

There are four existing zones that are already on permanent UTC-7:
	America/Dawson_Creek
	America/Creston
	America/Fort_Nelson
	America/Phoenix
None of these zones makes use the DST bit.  The time zone is displayed year round as MST instead of PDT.  I don't think anybody complains about it.

I don't see any compelling reason to treat the two Yukon zones (America/Whitehorse & America/Dawson) any differently than the four existing UTC-7 zones.
Consistency within the database is more important than trying to match the wording in each government press release and/or bill.
Therefore, America/Whitehorse & America/Dawson should be placed on UTC-7 with no DST bit and they should be given a time zone designation of MST. 

Keep in mind that in the future, it may be necessary to apply the same rules to America/Vancouver and America/Los_Angeles.

Note:
The Yukon press release uses the term "Pacific Daylight Saving Time" to refer to UTC-7.
https://yukon.ca/en/news/yukon-end-seasonal-time-change

Note:
The British Columbia (BC) government is waiting to see what California does before it drops the bi-annual time change.
In the meantime, the government has already passed an amendment for its Interpretation Act;  the amendment defines "Pacific Time" as UTC-7.  This makes me cringe.
https://news.gov.bc.ca/releases/2019PREM0118-002084
https://www.leg.bc.ca/parliamentary-business/legislation-debates-proceedings/41st-parliament/4th-session/bills/third-reading/gov40-3

-chris

-----Original Message-----
From: tz <tz-bounces at iana.org> On Behalf Of Michael H Deckers via tz
Sent: March 5, 2020 5:59 AM
To: tz at iana.org
Subject: Re: [tz] Yukon to move to year-round PDT


   On 2020-03-05 04:08, Tim Parenti wrote:



> +# Beginning 2020-03-08 02:00, use a base offset of -08:00 with 1:00 "permanent"
> +# DST for Yukon.


    I think the current method to deal with
    "permanent" summer time in tzdb is NOT to
    use the dst bit; see eg Turkey who are on
    summer time since 2016.

    The dst bit is reserved for switches to
    an alternate offset that is used for
    less than a year (except for the few
    historical cases of "war time").

    Michael Deckers.