When daylight saving time begins in March, clocks "spring forward" one hour, and when it ends in November, clocks "fall back" one hour.
This year, daylight saving time ends Sunday, Nov. 3, with clocks rolling back one hour at 2 a.m.With the change, it will get darker earlier in the evening across the United States.
When clocks "fall back" at the end of daylight saving time, people gain one hour of sleep. On Sunday, for example, falling asleep at 10 p.m., will really be like falling asleep at 9 p.m., once clocks roll back one hour at 2 a.m.
Daylight saving time became established law in the U.S. in 1918 with the passage of the Standard Time Act, according to the U.S. Naval Observatory's astronomical applications department.
Hawaii and Arizona -- with the exception of the Navajo Nation -- are the only two states in the nation that do not participate in daylight saving time, according to the DOT.
In 2023, the American Academy of Sleep Medicine formed a coalition to advocate for state and federal legislation making standard time permanent across the U.S. Other organizational members