When does Daylight Saving Time 2021 begin in Mexico?

08/03/2021

The countdown begins. There is less and less time left to say goodbye to winter, and soon it will be time to adjust the time on our clocks. In Mexico, Daylight Saving Time 2021 will begin on Sunday, April 4, at 02:00 am. The change will come into effect in all states of the national territory, with the exception of Sonora and Quintana Roo.

In the case of the border state of Sonora, the reason is economic, since the government of the entity agreed in 2016 with the executive of Arizona the creation of a commercial region to boost mutual growth. Consequently, both states decided to equalize their schedules.

As for Quintana Roo, since 2015 the southeastern Mexican entity adopted the use of 75 west time, one hour more with respect to the center of the country, and the same as New York or Havana. The decision was made for tourism reasons, as it was intended to guarantee travelers one more hour of sunshine throughout the year. Daylight saving time will last for six months and will end at 2:00 a.m. on October 31.

The main reason for this time change is to make better use of sunlight during the months of greatest sunshine, in order to obtain a reduction in electricity consumption during the hours of greatest electricity demand. To this end, in Mexico, since 1996, every time April arrives, clocks are set forward one hour. The adjustment is always made on the first Sunday of the month, and citizens are advised to turn the clock Saturday night, before going to bed.

Thus, daylight saving time will begin next April 4. And the day before, before going to bed, you will have to advance the hands of your analog devices one hour: that is, at two o'clock in the morning, it will be one o'clock. This means that we will get sixty more minutes of sleep that night. And from that day on, for six months, it will get dark later. Remember that most technological devices automatically make the change.

In March 2020, in the midst of the worrying pandemic that had put China, Italy, Spain, and the USA in check, the summertime change sparked a great political debate in Mexico. Due to the COVID-19 health contingency, deputies of the Democratic Revolution Party (PRD) then urged President Andrés Manuel López Obrador to eliminate or suspend daylight saving time, so as not to generate more situations of anxiety and stress. In the end, and despite the request of the PRD legislators, the change was implemented.

In fact, according to the School of Medicine of the National Autonomous University of Mexico (UNAM), time changes affect people's physical, emotional and intellectual performance. In children, it can alter their sleep cycle and the need to ingest food, while in the elderly it can also alter their rest, and provoke episodes of anxiety and insomnia.

For the time being, this year the debate has not yet arisen in the Chamber of Deputies, and daylight saving time will begin on April 4. The first equinox of the year will take place on March 20. On that day, spring will begin in the northern hemisphere and autumn in the southern hemisphere.

By Mexicanist