Daylight saving time is set to start in a few days. See why most of the U.S. observes it and when it starts and ends in California.

Daylight Saving Time will start early Sunday morning in the United States, and will continue until Nov. 2. The practice of setting clocks ahead one hour, which is meant to maximize daylight during the warmer months, always starts on the second Sunday in March and continues through the first Sunday in November.

Daylight saving time is the period between the second Sunday of March and the first Sunday of November when clocks for most states in the U.S. shift back for one hour.

Doctors say that while it's good to have an extra hour of sunlight, the time change can also cause sleep deprivation and other health problems.

According to TimeAndDate.com, daylight saving time will start on Sunday, March 9, this year. Clocks will “spring forward,” as the saying goes, at 2 a.m. (ET). And while there are those who simply shrug and dutifully change their clocks in accordance with the practice, there are others who are hoping time’s up for daylight saving time.

Congress has been asked repeatedly since 2018 to stop the twice-annual practice of changing between daylight saving and standard time.

Losing an hour of sleep as daylight saving time kicks in can do more than leave you tired and cranky the next day — it also could harm your health.