Daylight saving time (DST) is due to go into effect across most, but not all, of the United States and its territories on Sunday at 2 a.m. local time. However two American states, and five territories, are exempt either in part or in full.

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

Clocks had to "spring forward" one hour at 2 a.m. on Sunday, March 9, 2025, causing most people to lose an hour of sleep. We won't "fall back" to standard time again until Nov. 2, the first Sunday of November, when Americans fiddle with their clocks again.