The Southeast Zone is observed in the state of Quintana Roo, which is located on Yucatán Peninsula’s eastern part.
The eastern three-fourths part of Mexico observes the Central Zone. This includes the cities of Guadalajara, Mexico City, and Monterrey.
The Pacific Zone is observed in the states of Chihuahua, Sonora, Baja California Sur, Sinaloa, and Nayarit.
The state of Baja California, including its largest city Tijuana, uses the Northwest Zone.
Earlier, there were just three time zones in Mexico. On February 1, 2015, the state of Quintana Roo moved its clocks forward by an hour. The state now uses the newly created Southeast Zone, thus bringing the total number of zones in Mexico to four.
The Daylight-Saving Time begins on the first Sunday in April and ends on the last Sunday in October. However, the entire country does not observe DST. The areas not using Daylight Saving Time are the states of Sonora and Quintana Roo. The island territories of Mexico also do not observe the Daylight-Saving Time.