Overview
- Most of the U.S. will set clocks back one hour on Sunday, Nov. 2 at 2 a.m. local time, returning to standard time until March 8, 2026.
- Hawaii, most of Arizona (except the Navajo Nation) and the territories of Puerto Rico, Guam, American Samoa, the U.S. Virgin Islands and the Northern Mariana Islands do not change clocks.
- Federal law sets daylight saving time from the second Sunday in March to the first Sunday in November under rules overseen by the U.S. Department of Transportation.
- The Sunshine Protection Act to make daylight saving time permanent was reintroduced in January 2025 but has not advanced, while 19 states have passed laws contingent on federal approval.
- Research and medical organizations report that biannual clock changes disrupt circadian rhythms, with evidence favoring permanent standard time and advice to use morning light and gradual 10–15 minute schedule shifts to ease the transition.