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Time in Mexico

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Time in Mexico
Mexican time zone Standard DST U.S. equivalent
Zona Sureste UTC−05:00 Eastern Standard Time
Zona Centro UTC−06:00 UTC−05:00 Central Time
UTC−06:00 Central Standard Time
Zona Pacífico UTC−07:00 UTC−06:00 Mountain Time
UTC−07:00 Mountain Standard Time
Zona Noroeste UTC−08:00 UTC−07:00 Pacific Time

Mexico uses four main time zones since February 2015:[1]

  1. Zona Sureste (Southeast Zone) covers the state of Quintana Roo (the equivalent of Canadian and U.S. Eastern Time).
  2. Zona Centro (Central Zone) covers the eastern three-fourths of Mexico, including Mexico City, Guadalajara and Monterrey (the equivalent of Canadian and U.S. Central Time).
  3. Zona Pacífico (Pacific Zone) covers the states of Baja California Sur, Chihuahua, Nayarit, Sinaloa, and Sonora (the equivalent of Canadian and U.S. Mountain Time).
  4. Zona Noroeste (Northwest Zone) covers the state of Baja California, including Tijuana (the equivalent of Canadian and U.S. Pacific Time).

In addition, the law dictates that all island territories should fall within the time zone corresponding to their geographic location.

History

Standard time was first defined in Mexico in 1921, when President Álvaro Obregón decreed two time zones. One time zone designated for 90° W covered the states of Tabasco, Chiapas, Campeche, Yucatán, and Quintana Roo. A second time zone designated for 105° W covered the rest of the country, from Baja California to Veracruz and Oaxaca.[2]

In 1930 three zones were decreed: Hora del Oeste (120° W) for the state of Baja California (norte); Hora del Golfo (90° W) covering the states of Tamaulipas, Veracruz, Oaxaca, Tabasco, Chiapas, Campeche, Yucatán and Quintana Roo; and Hora del Centro (105° W) for the rest of the country.[3]

It was decreed in 1942 that the Hora del Noroeste (105° W) should cover only the states of Baja California Sur, Sonora, Sinaloa, and Nayarit; while the Hora del Centro (90° W) was used for the rest of the country.[4]

The time zone Hora del Sureste (75° W) was created for tourist reasons in 1981, originally covering the states of Campeche, Yucatán, and Quintana Roo.[5] The states of Campeche and Yucatán returned one year later to the Hora del Centro (90° W);[2] while Quintana Roo returned to the Hora del Sureste (75° W) in 2015.[1]

Daylight saving time

Main article: Daylight saving time in Mexico

First observation of DST was in 1931, but only for the state of Baja California. It used the "Hora del Centro" from April 1 to September 30, and the "Hora del Oeste" the rest of the year.[2] Until 1996, Baja California was the only Mexican state to observe DST, coinciding with the observance of DST across the border in San Diego, California.

Daylight saving time has been observed in Mexico beginning in 1996.[6] For municipalities located less than 20 km from the US border, such as Ciudad Juarez, and the entire state of Baja California (Norte),[7] it coincides with the longer extended daylight saving period adopted for 2007 in the United States. But in the rest of the country, daylight saving time is observed between 2 a.m. on the first Sunday in April through 2 a.m. on the last Sunday in October.[8] Quintana Roo and Sonora states do not observe DST.

As the United States starts DST on the second Sunday in March and ends it on the first Sunday in November, Mexico's time zones are out of synchronization with American and Canadian time zones for two periods each year. The first is the three or four weeks between the second Sunday in March and the first Sunday in April. The second is the single week between the last Sunday in October and the first Sunday in November. During these periods, clocks in Mexico City match those in Denver rather than those in Chicago. The Mexican Stock Exchange changes its hours during these periods in order to maintain synchronization with the U.S. markets. Conversely, television schedules are not changed for these situations, meaning Mexican television networks which are carried directly by American cable and satellite services have their programming aired an hour ahead or behind in the United States during these interregnums.

In 1998 the state of Chihuahua moved from Central time to Mountain time.[9] This is likely because Ciudad Juárez is directly across the border from El Paso, Texas, which is on Mountain Time. Later in 2001 Mexico experimented with a shorter daylight saving period from the first Sunday in May till the last Sunday in September.[10] The areas within 20 km of the United States border, as well as all of Baja California, began observing DST on the US schedule in 2010.[7]

Daylight saving time is observed in all parts of the country except for the states of Quintana Roo, and Sonora, which decided to remain on standard time beginning in 1999.[11] This is to coincide with the non-observation in Arizona, with which Sonora shares its northern border. The island territories do not currently observe daylight time either. During DST period, Mexico uses 4 different time zones.

IANA time zone database

Data for Mexico from zone.tab in the IANA time zone database. Columns marked with * are the columns from zone.tab itself.

c.c.* coordinates* TZ* comments* UTC offset UTC offset DST Notes
MX +1924−09909 America/Mexico_City Central Mexico −06:00 UTC-05:00
MX +2105−08646 America/Cancun Quintana Roo −05:00 UTC-05:00
MX +2058−08937 America/Merida Campeche, Yucatán −06:00 UTC-05:00
MX +2540−10019 America/Monterrey Durango; Coahuila, Nuevo León, Tamaulipas (most areas) −06:00 UTC-05:00
MX +2550−09730 America/Matamoros Coahuila, Nuevo León, Tamaulipas (US border) −06:00 UTC-05:00
MX +2313−10625 America/Mazatlan Baja California Sur, Nayarit (most areas), Sinaloa −07:00 UTC-06:00
MX +2838−10605 America/Chihuahua Chihuahua (most areas) −06:00 UTC-06:00
MX +2934−10425 America/Ojinaga Chihuahua (US border - east) −06:00 UTC-06:00
MX +2904−11058 America/Hermosillo Sonora −07:00 -
MX +3232−11701 America/Tijuana Baja California −08:00 UTC-07:00
MX America/Santa_Isabel −08:00 UTC-07:00
MX +2048−10515 America/Bahia_Banderas Bahía de Banderas −06:00 UTC-05:00

On 2010-01-06 a zone America/Ensenada named for Ensenada, Baja California was scheduled for inclusion with the comment "Split off Mexican cities (near US border) that are to follow US rules starting in 2010. Tijuana splits into Tijuana and Ensenada".[12]

See also

References

  1. ^ a b Adriana Varillas (2015-01-31). "Quintana Roo estrena nuevo horario pmañana". El Universal (in Spanish). Retrieved 2015-11-18.
  2. ^ a b c "Antecedentes del HV en México: Husos Horarios y Horario de Verano" (in Spanish). 2010-03-30. Retrieved 2015-11-18.
  3. ^ "Diario Oficial: Secretaria De Agricultura Y Fomento" (in Spanish). 1930-11-15. p. 4. Retrieved 2015-11-18.
  4. ^ "Diario Oficial: Seccion Segunda, Poder Ejecutivo Departmento Agrario" (in Spanish). 1942-04-24. p. 2. Retrieved 2015-11-18.
  5. ^ "Diario Oficial: Poder Ejecutivo, Secretaria De Gobernacion" (in Spanish). 1981-12-23. p. 3. Retrieved 2015-11-18.
  6. ^ "Daylight saving time dates for Mexico – Federal District – Mexico City between 1990 and 1999". Retrieved 2015-11-18.
  7. ^ a b "Northern Mexican Border's New Daylight Saving Plan". 2009-12-11. Retrieved 2015-11-18. Northern Mexico's border cities will share the same daylight saving schedule as the United States from 2010 onwards.
  8. ^ "Comisión Nacional para el Ahorro de Energía". 2008-03-15. Archived from the original on 2008-06-09. Retrieved 2015-11-18. {{cite web}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
  9. ^ "Daylight saving time dates for Mexico – Chihuahua – Chihuahua between 1990 and 1999". Retrieved 2015-11-18.
  10. ^ "Daylight saving time dates for Mexico – Federal District – Mexico City between 2000 and 2009". Retrieved 2015-11-18.
  11. ^ "Daylight saving time dates for Mexico – Sonora – Hermosillo between 1990 and 1999". Retrieved 2015-11-18.
  12. ^ Arthur David Olson (2010-01-06). "proposed time zone package changes for Dhaka and Mexico". comp.time.tz newsgroup. Retrieved 2015-11-18.
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