Overview
- The shift occurs at 2 a.m. local on Sunday, Nov. 2, moving clocks back one hour and bringing earlier sunrises and earlier sunsets; in San Diego the sun sets around 4:56 p.m., according to NOAA.
- Hawaii, most of Arizona, and several U.S. territories do not observe the practice, and states may choose permanent standard time but cannot adopt permanent daylight time without congressional approval.
- Lawmakers in roughly 35 states are weighing clock‑locking measures, including California, where a 2024 bill to institute year‑round standard time stalled after voters authorized pursuing a permanent change in 2018.
- Sleep and medical experts say the switch can disrupt circadian rhythms and advise morning light exposure, consistent sleep schedules, screen limits in the evening, and skipping a Sunday lie‑in.
- Officials recommend setting manual clocks before bed and using the time change to test and replace batteries in smoke and carbon monoxide alarms.