[tz] America/Santa_Isabel

[Matt Johnson]

Thanks for the dedication to listen for this!
I'm not sure that we should jump to remove America/Santa_Isabel just yet, due to dependencies that might be impacted.
Specifically, there is a corresponding entry in Windows,  "Pacific Standard Time (Mexico) |(UTC-08:00) Baja California" which is mapped in CLDR to America/Santa_Isabel.  I've got a parallel discussion going within Microsoft about this zone, and will share the findings of our research.  Changing it to link with America/Tijuana will mean that there will  be yet another "unmappable" zone.
Also, there's a chance that San Quintin could indeed start using Mexican DST rules in 2017, since it is becoming its own municipality in December 2016.  By the wording of the current regulation, wouldn't they have to?  Of course they could always publish a new regulation by then.
Thanks,Matt
Date: Sun, 25 Oct 2015 16:42:14 -0400
From: arthurdavidolson at gmail.com
CC: tz at iana.org
Subject: Re: [tz] America/Santa_Isabel

> So it appears that the experimental github version is the way to go.
> Namely, remove America/Santa_Isabel (since it was a false alarm) and 
leave behind a backwards-compatibility link for it.

Baja California Norte is, as of this writing, divided into five municipios (think counties in US terms).
If we've got all the updates to the law, the entire municipios of Tijuana, Ensenada, and Mexicali (as distinct from those cities) follow US rules, as do places within 20 km of the Mexico/US border. This weekend's monitoring of XEQIN tends to confirm the supposition that all of the municipio of Ensenada uses US rules.

There are parts of the remaining two municipios--Tecate and Playas de Rosarito--that are south of the 20 km zone; they might follow Mexican rules. If they do, they're surrounded on all sides by Mexican areas following US rules (or ocean); this seems unlikely, but we are in the realm of time zones (take Indiana--please).

Improvidently, I've failed to find any radio stations with an online presence located in the Tecate or Playas de Rosarito areas of interest.

    @dashdashado

On Sun, Oct 25, 2015 at 4:00 PM, Paul Eggert <eggert at cs.ucla.edu> wrote:
Arthur David Olson wrote:


And the word today from XEQIN...

         http://ecos.cdi.gob.mx/xeqin.html

...in San Quintín, Mexico is "doce de la tarde con veinticinco minutos"

(literally, "12 of the afternoon with 25 minutes") at 15:25 USEDT; they're

still on Pacific Daylight Time.




Thanks for checking this. So it appears that the experimental github version is the way to go. Namely, remove America/Santa_Isabel (since it was a false alarm) and leave behind a backwards-compatibility link for it.


 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mm.icann.org/pipermail/tz/attachments/20151025/fe9e65fa/attachment.html>