Daylight saving time will begin on Sunday, March 10 at 2am, when our clocks will go ahead one hour, part of the twice-annual time change that affects millions, but not all, Americans.

When daylight saving time begins, we will “spring forward,” and lose an hour of sleep, as opposed to the November time change, where we “fall back,” and gain an extra hour.

Daylight saving time is when “daylight” begins an hour later in the morning and lasts an hour longer in the evening. This allows the hour of daylight to stay coordinated with the time most people are active outside. Daylight saving time is supposed to save energy since during the warmer months majority will be outside and not home which saves energy.

The push to stop changing clocks has been put before Congress in the last couple of years, when the U.S. Senate unanimously approved the Sunshine Protection Act in 2022, a bill that would make daylight saving time permanent. However, it did not pass in the U.S. House of Representatives and was not signed into law by President Joe Biden.

Not all states and U.S. territories participate in daylight saving time.

Hawaii and Arizona (with the exception of the Navajo Nation) do not observe daylight saving time, and neither do the territories of American Samoa, Guam, the Northern Mariana Islands, Puerto Rico and the U.S. Virgin Islands.

In 2024, daylight saving time will end for the year at 2am on Sunday, November 3.