In 2007, the United States and Canada decided to start Daylight Saving Time (DST) on the second Sunday of March and end on the first Sunday of November. Which means for those of you NOB (North of the Border), don't forget you should have changed your clocks this morning at 2am, or last night before you went to bed. And remember, the extra hour time difference for the next 3 weeks with your SOB (South of the Border) friends!
Daylight saving time is referred to in Spanish as "horario estacional" or "horario de verano".
So here are the dates of Daylight Savings Times for Mexico from 1996 through to 2015
(future dates are tentative, because after all, things change)
Year - Start date - End date - Daylight duration
1996 Apr 7 Oct 27 29 weeks
1997 Apr 6 Oct 26 29 weeks
1998 Apr 5 Oct 25 29 weeks
1999 Apr 4 Oct 31 30 weeks
2000 Apr 2 Oct 29 30 weeks
2001 May 6 Sep 30 21 weeks
2002 Apr 7 Oct 27 29 weeks
2003 Apr 6 Oct 26 29 weeks
2004 Apr 4 Oct 31 30 weeks
2005 Apr 3 Oct 30 30 weeks
2006 Apr 2 Oct 29 30 weeks
2007 Apr 1 Oct 28 30 weeks
2008 Apr 6 Oct 26 29 weeks
2009 Apr 5 Oct 25 29 weeks
2010 Apr 4 Oct 31 30 weeks
2011 Apr 3 Oct 30 30 weeks
2012 Apr 1 Oct 28 30 weeks
2013 Apr 7 Oct 27 29 weeks
2014 Apr 6 Oct 26 29 weeks
2015 Apr 5 Oct 25 29 weeks
Remember it is Spring Forward, and Fall Back
Just FYI, most of this info is taken from this site
http://www.timeanddate.com/news/time/mexico-daylight-saving.html
so if you want to read more about just click and go!