When Does Est Start In 2025. Eastern standard time (est) starts on sunday, november 3, 2025 at 2:00 am local time and clocks are set one hour back to sunday, november 3, 2025, 1:00 am. Eastern time zone starts daylight saving time sunday march 10, 2025 at 2:00 am local time.

Daylight saving time 2025 is all set to kick off across the vast parts of the us on march 10. We “fall back” one hour and return to standard time on sunday, november 3, 2025 at 2 a.m.