Where the clocks change—and where they do not
The November 1 change applies where daylight saving time is observed. Hawaii and most of Arizona do not make the switch; the Navajo Nation is an exception within Arizona. Some US territories also do not observe daylight saving time.[2]
Local time in US areas that observe daylight saving time.
If you are arranging a call or traveling between regions, check the local time at both ends. Use the time shown in the appointment or booking, rather than a remembered time difference.
Check the clocks you actually use
Check each device's settings before assuming it will change automatically. Start with the clocks you rely on for waking up or leaving home, then confirm the times for Sunday's plans.
- Saturday evening, October 31: check the settings on your phone and alarm clock, and note any clocks that need changing by hand.
- Sunday morning, November 1: compare the clocks you use with one set correctly to local time.
- Before a call, visit or journey: check the time shown by the organizer or booking provider, especially if another time zone is involved.
Keep the evening familiar
For everyday sleep habits, the US National Heart, Lung, and Blood Institute recommends consistent bedtimes and wake-up times, with quiet time before bed and less bright light from screens.[1]
You might set out what you need for the morning, put your devices aside and choose a quiet activity you already enjoy. The aim is a familiar evening, with the clock check taken care of before you settle down.