T wice a year, we all “spring ahead” or “fall back”—and we’re just about to do the latter. On Sunday, November 2, at 2 a.m.

We’ve all heard of daylight saving time, and every March, we know to set our clocks forward, while setting them back in ...

In 1974, the U.S. tried staying on daylight saving time all year. The result was darker mornings and public panic.

Every October, there's a week when Europe and the U.S. are out of sync with daylight saving time, potentially confusing people organizing international meetings.