[tz] America/Nuuk changes from UTC-2 to UTC-2

[Paul Eggert]

On 11/24/22 11:25, Jonas Nyrup via tz wrote:
> On last Saturday in October 2023 when DST ends America/Nuuk will switch
> from -03/-02 to -02/-01

Thanks for the heads-up. Somehow I missed your email at first, and in 
response to Jürgen Appel's later email 
<https://mm.icann.org/pipermail/tz/2022-November/032343.html>, three 
days ago I installed a patch 
<https://mm.icann.org/pipermail/tz/2022-November/032344.html> guessing 
that the Nuuk and Ittoqqortoormiit areas will both switch to "permanent 
DST" (i.e., change of standard time, and no DST) in March. However, my 
guess about Ittoqqortoormiit seems to have jumped the gun, as the last 
two paragraphs of the URL that you gave:

> https://sermitsiaq.ag/groenland-skifte-tidszone-trods-bekymringer

says that the intent is that Nuuk will not to back to winter time in 
fall 2023, and that other Greenland regions are unaffected (though this 
may change).

> I assume the official document will be published on
> https://naalakkersuisut.gl/kundgoerelser/2022?sc_lang=da

I found a copy of that document here:

https://naalakkersuisut.gl/-/media/naalakkersuisut/filer/kundgoerelser/2022/11/2511/31_da_inatsisartutlov-om-tidens-bestemmelse.pdf?la=da&hash=A33597D8A38CC7038465241119EF34F3

It says that standard time becomes -02 on March 25 (when DST would have 
otherwise switched clocks to -02 anyway), and that Naalakkersuisut can 
decide DST rules as well as time zone rules for some areas.

It sounds like they're still thinking about exactly what this all means, 
that they don't like Nuuk's switching back and forth but haven't 
codified this yet, and that they don't yet know what Ittoqqortoormiit 
will prefer. So for now I think it's better to back out the change to 
Ittoqqortoormiit that I guessed three days ago.

Proposed patch attached and installed into the development database.
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