Listening to XEQIN...
    http://ecos.cdi.gob.mx/xeqin.html
...from San Quintín, Mexico this evening, I heard the announcement "cinco de la tarde con un minuto" (literally, "five in the afternoon with one minute") when it was 20:01 USEDT; this means San Quintín was on Pacific Daylight Time.

More importantly, I later heard an announcer emphatically ("no no no") telling listeners not to set their clocks back until a week from now ("es hasta el primer domingo de noviembre").

I hope to listen tomorrow evening to verify that clocks there have not been set back (and listen again next weekend to verify that they have been). Assuming so, that will leave the question of where (if anywhere) in Baja California Norte clocks are switched using Mexican rules.

    @dashdashado

On Sat, Oct 10, 2015 at 9:24 AM, Arthur David Olson <arthurdavidolson@gmail.com> wrote:
Radio station XEQIN of San Quintín has a web presence:
    http://ecos.cdi.gob.mx/xeqin.html
It's a daytimer, the web page says it broadcasts from 5:00 a.m. until 7:00 p.m. Streaming wasn't working for me today here in Maryland until shortly after 9:00 a.m.; I'm now (~9:15) hearing a Spanish-language announcer who has mentioned the date, meaning it should indeed be a live stream. I haven't yet heard a time announcement, and I'm surprised the streaming started at 9:00 my time rather than 8:00 my time.

We'll see what happens in the coming days and weeks--in particular between October 25 and November 1. (If nothing else, we may produce a spike in XEQIN's ratings.)

    --ado

On Fri, Oct 9, 2015 at 8:02 PM, Matt Johnson <mj1856@hotmail.com> wrote:
+1 for America/San_Quintin.   Thanks Greg.

Also - and you guys are going to love this - I looked up the coordinates we have for America/Santa_Isabel in zone.tab, which are +3018-11452, and look what I found:


 
 


We've picked "Sierra Santa Isabel" - a mountain range.  :)


Nowhere near the actual town of Santa Isabel either. 


> To: gregsla@microsoft.com; tz@iana.org
> From: eggert@cs.ucla.edu
> Date: Fri, 9 Oct 2015 13:31:56 -0700
> Subject: Re: [tz] America/Santa_Isabel

>
> On 10/09/2015 10:47 AM, Greg Slayden wrote:
> >
> > I see conflicting information online about when DST ends there, either
> > November or October. Making contact with locals in that area is likely
> > the best way to find out
> >
>
> Yes, if we can establish that San Quintín uses Mexico's DST rules, we
> can effectively replace America/Santa_Isabel with America/San_Quintin.
> Normally we'd prefer Lázaro Cárdenas as it has more people, but it's an
> ambiguous name whereas San Quintín is not.