Overview
- The switch begins Sunday, March 8 at 2:00 a.m. local time (2:00 → 3:00) and ends Sunday, November 1 at 2:00 a.m. (2:00 → 1:00).
- Most states observe the change, with Hawaii, most of Arizona, and territories including Puerto Rico, Guam, American Samoa, and the U.S. Virgin Islands not participating.
- California, New York, and Illinois will follow the federal schedule; California’s push to end clock changes advanced by 2018’s Proposition 7 but a 2024–25 bill for permanent standard time failed.
- Phones, computers, and smartwatches typically update automatically, while ovens, microwaves, older car dashboards, and analog clocks often require manual adjustment the night before.
- The current second-Sunday-in-March to first-Sunday-in-November framework has been in place since 2007 under the Uniform Time Act, and states may opt out only to permanent standard time without congressional approval.