Like every year, this Sunday, March 12 Daylight saving time begins in the United States and clocks are moved forward one hour. However, there are some states that will not change their schedule, mainly because they want to avoid the impact this practice has on sleep health and well-being.

The states that time does not change are Arizona, Hawaii, Puerto Rico, Guam, American Samoa and the Virgin Islands. The authorities have arranged it that way because according to some studies the time change can affect people’s sleep, heart rate, and even their mood.

On the other hand, there are states that have proposed waiving the time change, as is the case Texas, Florida and Californiabut no agreement has yet been reached to finalize this measure

Time change in the United States It is held twice a year, in March and November., and aims to take advantage of sunlight in the summer months and save energy. Moving the clock forward an hour allows the inhabitants of the places that change the schedule to take advantage of the afternoon sunlight.

In November, as it gets dark earlier, time returns to normal and benefits from the morning light.