[tz] Quintana Roo change to EST?

[Gwillim Law]

On Mon, Dec 8, 2014 at 8:18 AM, Steffen Thorsen <thorsen at timeanddate.com>
wrote:

> The Mexican state of Quintana Roo will likely change to EST in 2015, by not
> going back from DST in October 2015. Its a bit unclear if they will still
> observe
> DST the years after.
>
> Some sources in Spanish:
> http://sipse.com/novedades/reconocen-el-trabajo-de-
> empresarios-con-cambio-de-huso-horario-126236.html
> http://www.unioncancun.mx/articulo/2014/12/04/medio-
> ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo
>
> The second article cited has another point that affects time zone history.
It says,

Con la modificación, se podría terminar con el conflicto horario que existe
entre los municipios de Quintana Roo con el municipio de Felipe Carrillo
Puerto, mismo que se declaró en rebeldía desde hace 15 años en que fue
instaurado un cambio de horario en México y, desde entonces, se ha negado a
modificar su huso horario como el resto del país.

My translation:

With this change, the time conflict that has existed between the municipios
of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an
end. The latter declared itself in rebellion 15 years ago when a time
change was initiated in Mexico, and since then it has refused to change its
time zone along with the rest of the country.

Background:

Mexico's primary subdivisions are states, and its secondary subdivisions
are municipios. Quintana Roo (QRoo) is the name of both a state and a
municipio. The municipio of QRoo is in Yucatán state, not QRoo state. The
municipio of Felipe Carrillo Puerto (FCP) is in QRoo state. Therefore, "los
municipios de QRoo" probably means the municipios that constitute QRoo
state, excluding FCP.

There are several *populated places *in Mexico named FCP, but only one
*municipio
*by that name - the one in QRoo. They are all named for a Mexican
statesman. As customary, his last name, Carrillo Puerto, was formed from
his father's and mother's patronymics.

According to the tz database, the event that occurred 15 years ago was that
QRoo state (America/Cancun) switched from Eastern to Central Time on
1998-08-02, homogenizing it with the rest of the Yucatán peninsula
(America/Merida). Both areas have observed DST since 1982.

Conclusion:

If the paragraph is correct and I've understood it correctly, there should
be a new zone for FCP municipio, equivalent to America/Cancun until
1998-08-02 and remaining on E%sT after that date. Abbreviating the zone
name to fourteen characters or fewer is problematic. America/CarrilloPuerto
might be acceptable.

Gwillim Law
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