When Do Clocks Change 2024 Usa Dates. On this date becomes 1 a.m.) be sure to set your clocks back one hour. The change of summer begins at 2:00 a.m., time in which the clocks must move forward one hour, to 3:00 am.

Today, most americans spring forward (turn clocks ahead and lose an hour) on the second sunday in march (at 2:00 a.m.) and fall back (turn clocks back and gain an hour) on. In 2024, daylight saving time will begin at 2 a.m.