Daylight Saving Time for 2025 begins in most parts of the United States at 2 a.m. on Sunday, with Americans losing an hour of sleep but gaining one of daylight.

While all but two states in the U.S. continue to observe daylight saving time, there is still disagreement about whether it should be eliminated or made permanent.

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

Daylight saving time runs from the second Sunday in March to the second Sunday in November. Digital clocks will automatically advance one hour at 2 a.m. on March 9.

Know when and how to change your analog and digital clock for daylight saving time and what the time change means for your spring days.

Most people in the U.S. will soon face the first the twice-annual hourly disruptions as daylight saving time will sweep into effect in under a week. The practice of springing the clocks ahead an ...

Donald Trump has opposed daylight saving time in the past, though he appeared neutral on the topic in March 2025. Immediate changes to the system are unclear.

Daylight-saving time may seem like a harmless shift. But doctors say it has deadly consequences, increasing risks of heart attacks, and car accidents.