At 2:00 a.m. on October 31, 2021 winter time will come into effect in Mexico, so you should set your clock back one hour, preferably one night before, in order to wake up with the new time and avoid setbacks. The new schedule puts an end to daylight saving time, which began on April 4 and will end on October 30.
In the border area with the United States, daylight saving time ends on the first Sunday of November at 2:00 am. Additionally, the states of Sonora and Quintana Roo do not participate in daylight saving time, so there are no clock adjustments in these areas.
Daylight saving time, which lasts almost seven months, was established in Mexico in 1996, with the purpose of saving and reducing the consumption of electric energy, making more use of daylight. In the northern border zone it begins on the first Sunday in March and ends on the first Sunday in November.
Among the main health effects of the time change are fatigue and drowsiness due to not having a restful sleep, according to the Sleep Clinic of the National Autonomous University of Mexico (UNAM). It is also possible that people suffer from mood changes, derived from not sleeping well, as a consequence of a lack of adaptation.
On Sunday, April 3, 2022 at 2:00 a.m., the clock will be moved forward one hour to start Daylight Saving Time 2022 in Mexico.