Overview
- The U.S. Naval Observatory confirms clocks move ahead one hour at 2 a.m. local time on Sunday, March 8, with this year marking the earliest possible start under the second‑Sunday rule.
- Hawaii and most of Arizona do not observe the switch, though the Navajo Nation does, and U.S. territories including Puerto Rico, Guam, American Samoa, the Northern Mariana Islands and the U.S. Virgin Islands also opt out.
- Smartphones and most internet‑connected devices should update automatically, but households may need to reset ovens, microwaves and other manual clocks before bed on March 7.
- Researchers cite short‑term sleep loss and transient increases in cardiovascular and accident risk after the spring shift; recommended steps include moving bedtime 10–20 minutes earlier over several nights, getting morning light, and limiting late caffeine, alcohol and screens.
- Policy efforts to change the system, including H.R. 7378 proposing a half‑hour adjustment and other permanent‑time bids, remain under review, while Canada’s observing regions also spring forward March 8 and the U.K. follows on March 29.