Daylight saving time​ in 2025, when clocks change by an hour, has started. Here's a look at when exactly we "spring forward." ...

Like how the hours fly by when you're hanging out with a ... tiny amounts of time—billionths of a second. In 1971, scientists used these clocks to test Einstein's ideas. One atomic clock was ...

After approximately four months of observing standard time, clocks will spring forward overnight as the observance of daylight saving time begins in much of the United States.