Since the anticipated change is now less than two weeks away, I've drafted some patches, attached.

(0001 is just a minor fixup to a previous NEWS item for grammatical consistency.)

0002 simply shifts America/Cancun, the existing zone representing Quintana Roo state, ahead by one hour from CST with daylight saving to EST without, effective 2015-02-01 02:00.

As for 0003, which carves out a new zone for Felipe Carrillo Puerto's divergent history, it's not clear the extent to which this is actually necessary.  What did FCP actually do between 1998 and the present?  Would someone calling local offices be effective in helping us find out?  (In the meantime, I've simply created this patch so we can at least get a sense of what it might look like; I don't actually feel that it should be applied at this time until these questions are resolved.)
--
Tim Parenti
On 14 Jan 2015 12:35, Carlos Raúl Perasso wrote:
According to Boletín Nº 4764 from Mexico's Cámada de Diputados, the modification of the Hour System Law in the United States of Mexico (Ley del Sistema de Horario en los Estados Unidos Mexicanos) has been approved, although this modification has not yet been published.

Links:

- Boletin Nº 4764: http://www5.diputados.gob.mx/index.php/esl/Comunicacion/Boletines/2014/Diciembre/04/4764-Diputados-avalan-crear-la-Zona-Horaria-Sureste-para-Quintana-Roo

- Ley del Sistema Horaio en los Estados Unidos Mexicanos: http://www.diputados.gob.mx/LeyesBiblio/ref/lsheum.htm

Saludos,

Carlos

On Wed, Jan 14, 2015 at 1:45 PM, Gwillim Law <gwillim@gmail.com> wrote:
My translation of the cited article:

"... the new time zone will come into effect at two o'clock on the first Sunday of February, when we will have to advance the clock one hour from its current time, ...

"Federal deputy Lizbeth Gamboa Song stated that a new change for the month of April is not considered as yet, given that only the State will advance to summer time.

"Nevertheless, the deputy noted that Summer Time has applied in Mexico since 1996, to which all entities of the federation adhere, advancing their clocks one hour. In addition, she noted that it is yet unknown whether Quintana Roo will participate in a further change, but if so, the authorities will officially publish that fact in due time."

My Spanish is not native level, but I think the article makes it clear that the decision about DST for Quintana Roo has not yet been made.

Gwillim Law

On Wed, Jan 14, 2015 at 10:43 AM, Steffen Thorsen <thorsen@timeanddate.com> wrote:
On 08/12/14 14:18 , Steffen Thorsen 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.
 According to this source, Quintana Roo will change to EST as soon as 1 February 2015 at 2am:
http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html

Through Google Translate, it says "According to the authorities, the term of the new time zone start at two o'clock on the first Sunday of February, when we brought forward one hour actual[?] hours, so the clock will be three o'clock."

Also, the new zone will not use DST.


Best regards,
Steffen Thorsen - timeanddate.com