- Time in Mexico
offsets as defined in the federal Law of Time Systems: [National Commission for the Conservation of Energy [http://www.conae.gob.mx/work/sites/CONAE/resources/LocalContent/4634/5/Leyhorario.pdf] ]
*Zone 1 (Central Zone) covers most of Mexico and is equivalent to
UTC-6(the equivalent of Canadian and U.S. Central Time Zone).
*Zone 2 (Pacific Zone) covers the states of
Baja California Sur, Chihuahua, Nayarit, Sinaloa, and Sonora, which use UTC-7(the equivalent of Canadian and U.S. Mountain Time Zone).
*Zone 3 (Northwest Zone) covers the state of
Baja Californiaand uses UTC-8(the equivalent of Canadian and U.S. Pacific Time Zone).
In addition, the law dictates that all island territories should fall within the time zone corresponding to their geographic location.
Daylight saving time
Daylight saving time("horario estacional" in Spanish as referred to in the law, but "horario de verano" in colloquial speech) has been observed in Mexico beginning in 1996. [Mexico City time changes in 1996 [http://www.timeanddate.com/worldclock/timezone.html?n=155&syear=1990] ] It does not coincide with the longer extended daylight saving period adopted for 2007 in the United States. Rather, the law dictates that daylight saving time be observed between 2 a.m. on the first Sunday in April through 2 a.m. on the last Sunday in October. [National Commission for the Conservation of Energy [http://www.conae.gob.mx/wb/CONAE/CONA_924_periodo_de_aplicacio] ] In 2001 Mexico experimented with a shorter daylight saving period from the first Sunday in May till the last Sunday in September. [Mexico City time changes in 2001 [http://www.timeanddate.com/worldclock/timezone.html?n=155&syear=2000] ]
Daylight saving time is observed in all parts of the country except for the state of
Sonora, which decided to remain on standard time beginning in 1999 [Hermosillo time changes in 1999 [http://www.timeanddate.com/worldclock/timezone.html?n=503&syear=1990] ] to coincide with the non-observation in southern Arizonawith which Sonora shares a border. The island territories do not currently observe daylight time either.
Baja Californiathe daylight saving time has been observed from several decades ago and until 1996 was the only Mexican state to observe the DST.
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