Overview
- The switch does not apply in Hawaii, most of Arizona or U.S. territories including Puerto Rico, Guam, American Samoa, the U.S. Virgin Islands and the Northern Mariana Islands.
- Travelers should verify flight and rail itineraries as operators adjust schedules, and many border regions in Mexico will shift to be only one hour behind most U.S. locations.
- Time zones and Daylight Saving Time are regulated federally by the U.S. Department of Transportation, leaving state moves such as Texas’ approved HB 1393 and proposals in Florida and California on hold without congressional approval.
- Sleep specialists report temporary disruptions after the change, with research linking the shift to small short-term increases in traffic incidents and cardiovascular risks.
- Standard Time remains in effect until the second Sunday in March 2026, commonly cited as March 8, when Daylight Saving Time resumes.