The end of daylight saving time is near. And come Sunday, time will shift back an hour for most of the U.S.

When is daylight saving time?

For states that follow daylight saving time, it begins on the second Sunday of March, when clocks “spring forward,” and ends when clocks “fall back” on the first Sunday of November each year.

This year, daylight saving time began on March 10 and will end on Sunday, Nov. 3 at 2 a.m., so mark your calendar and enjoy an extra hour of sleep. Sunrise and sunset will shift to be about an hour earlier.

Time will “spring forward” again on March 9, 2025.

How did daylight saving time come to be?

Some say Benjamin Franklin invented daylight saving time while others point to different individuals. According to an article published on the Johns Hopkins University Bloomberg School of Public Health website, pushing clocks forward during the warmer months to make more use of daylight and thus conserve energy was adopted during WWI.

The Uniform Time Act of 1966 established a standardized system of daylight saving time throughout the U.S.

Who doesn’t observe daylight saving time?

Hawaii and Arizona, except the Navajo Nation, don’t observe daylight saving time. Guam, American Samoa, North Mariana Islands, Puerto Rico and the U.S. Virgin Islands, all U.S. territories, also don’t observe daylight saving time according to the Department of Transportation, which oversees timezones.

In 2022, the U.S. Senate passed a bill that would have made daylight saving time the new permanent standard time beginning in November 2023, but the legislation didn’t pass in the House of Representatives. In recent years, state legislatures have considered at least 650 bills and resolutions to institute yearlong daylight saving time should federal law allow it, according to the National Conference of State Legislatures.

Maryland Del. Brian Crosby, a Democrat from St. Mary’s County, sponsored legislation in 2021 to establish Eastern Daylight Time in the state year-round. The bill didn’t pass in 2021, nor did subsequent iterations introduced again by Crosby in 2022 and 2023.