[tz] America/Santa_Isabel

[L. David Baron]

On Thursday 2015-10-08 22:40 -0700, Paul Eggert wrote:
> Steve Jones wrote:
> >So it sounds like the actual implementation may not extend all the way down to
> >the Baja/Baja Sur border.
> 
> Yes, that sounds definitive.  I suppose we could rename America/Santa_Isabel
> to America/Cedros_Island, since we know Cedros Island observes UTC-8 with
> Mexican rules.  But it'd be nicer if we could find the largest town in that
> time zone region.

A few more links (although Steve Jones's post to which you're
replying hasn't made it through to the list yet):

A few press releases from early march of this year, from:

  The mexican national government:
    http://www.informador.com.mx/mexico/2015/580217/6/horario-de-verano-iniciara-manana-en-33-municipios-fronterizos.htm

  The Baja California state government:
    http://www.bajacalifornia.gob.mx/portal/noticia_completa.jsp?noticia=25837

  And the Ensenada municipal government:
    http://www.ensenada.gob.mx/xxi/?p=12515
  which is of interest since it is the farthest of the 5
  municipalities of Baja California from the US border, per:
    https://en.wikipedia.org/wiki/Municipalities_of_Baja_California

The state government press release seems to imply that the entire
state follows the US rules.

The Ensenada municipality press release lists 11 frontier
municipalities in which the US rules apply (including 3 of the 5
municipalities of Baja California), but doesn't imply that the list
is complete.  It also seems to say the whole state follows US rules.
It also says that the Centro Nacional de Metrología is in charge of
time in the country.

Most interestingly, the national government press release lists 33
municipalities in which the US rules apply (and lists all 5 of the
municipalities of Baja California):

> Los 33 municipios fronterizos en donde el horario de verano iniciará son: Tijuana, Mexicali, Ensenada, Playa Rosarito y Tecate, en Baja California; Juárez, Ojinaga, Ascensión, Coyame del Sotol, Guadalupe, Janos, Manuel Benavides y Praxedis G. Guerrero, en Chihuahua.
>  
> Además de Acuña, Piedras Negras, Guerrero, Hidalgo, Jiménez, Zaragoza, Nava y Ocampo, en Coahuila; Anáhuac y Los Aldama, en Nuevo León; Nuevo Laredo, Reynosa, Matamoros, Camargo, Guerrero, Gustavo Díaz Ordaz, Mier, Miguel Alemán, Río Bravo y Valle Hermoso, en Tamaulipas.

Or, to both translate and present in list form, it's listing the
following municipalities in the following states:

Baja California (5 of 5 municipalities):
  Tijuana
  Mexicali
  Ensenada
  Playa Rosarito
  Tecate

Chihuahua (8 of 67 municipalities):
  Juárez
  Ojinaga
  Ascensión
  Coyame del Sotol
  Guadalupe
  Janos
  Manuel Benavides
  Praxedis G. Guerrero

Coahuila (8 of 38 municipalities):
  Acuña
  Piedras Negras
  Guerrero
  Hidalgo
  Jiménez
  Zaragoza
  Nava
  Ocampo

Nuevo León (2 of 51 municipalities):
  Anáhuac
  Los Aldama

Tamaulipas (10 of 43 municipalities):
  Nuevo Laredo
  Reynosa
  Matamoros
  Camargo
  Guerrero
  Gustavo Díaz Ordaz
  Mier
  Miguel Alemán
  Río Bravo
  Valle Hermoso

I got the state totals from:
https://en.wikipedia.org/wiki/Municipalities_of_Baja_California
https://en.wikipedia.org/wiki/Municipalities_of_Chihuahua
https://en.wikipedia.org/wiki/Municipalities_of_Coahuila
https://en.wikipedia.org/wiki/Municipalities_of_Nuevo_Le%C3%B3n
https://en.wikipedia.org/wiki/Municipalities_of_Tamaulipas


The best I could find at the Centro Nacional de Metrología was this:
http://www.cenam.mx/hora_oficial/ndisposicion.aspx which first
quotes from a decree that lists a smaller list of municipalities,
and then gives a broader rule that says all municipalities within
20km of the US border *plus* the municipality of Ensenada in Baja
California follow the US rules.  (The smaller list quoting from law
matches the one in the Ensenada municipalitity's press release with
the exception of Ensenada municipality, which is in the
municipality's list but not the list in the decree quoted by CENAM.)


(I'd caution that my Spanish is reasonably good, but not the level
of a native speaker.  Probably better than Google Translate,
though.)

-David

-- 
𝄞   L. David Baron                         http://dbaron.org/   𝄂
𝄢   Mozilla                          https://www.mozilla.org/   𝄂
             Before I built a wall I'd ask to know
             What I was walling in or walling out,
             And to whom I was like to give offense.
               - Robert Frost, Mending Wall (1914)
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