Atomic clocks are more accurate than those used to define the second, suggesting the definition might need to change ...

The clock was turned back an hour in November and soon it will be time to spring it forward. Find out when daylight saving time starts and ends in 2025.

Many Americans have long grown frustrated with the constant time shifts. Here's what to know about the state of daylight ...

Tik-tok, tik-tok ... It's almost time to "spring ahead" for daylight saving time. Here's when to make the switch.

Is it time to stop changing our clocks twice a year? Here's a state-by-state look at efforts to make daylight saving time ...

In March every year, the U.S. moves from Standard Time to Daylight Saving Time, a controversial time change to preserve ...

Twice a year, people throughout the country change their clocks — once to “spring ahead,” and again to “fall back.”Here's ...

We’ve tried permanent daylight saving time before. In the 1910s, it was enacted as a wartime measure and repealed after a year. It came back in 1942 due to World War II, setting off decades of states ...