[tz] Yukon to move to year-round PDT

[Paul Eggert]

On 3/5/20 5:31 PM, Paul Goyette wrote:
> Doesn't such a position, however, fly in the face of the "boots on the
> ground" approach we've taken in other situations?

Yes it does. But then, we consistently flew in the face of that approach 
in the past when this situation arose, so at least we'd be 
*consistently* inconsistent. (There is a technical obstacle to having a 
time zone observe DST indefinitely, as this can't be implemented via 
POSIX TZ strings on many platforms.)

Another possibility would be to put "-07" into the database for now, 
until we find out what abbreviation (if any) people actually use once 
the timestamps diverge in November. If people end up using "PDT" next 
winter in Yukon we can put that into the database, even though it will 
be odd that it's "PDT" even though the is_dst flag will be 0 due to the 
abovementioned technical obstacle.

I've been fearing this technical snafu for many months as the "permanent 
DST" movement has gained steam in North America.