Daylight saving time begins on Sunday morning in most of the United States, but Arizona residents don’t have to switch their clocks. DST is not observed. Who wants the sun to rise for one more hour in mid-July? We’ll wait for it to harden so that things cool down—we’re praying.

In the rest of the country, when the clock strikes 2am on Sunday, people wake up early until 3am. Most states except Arizona and Hawaii have only 23 hours on Sunday, but usually 24 hours.

The Navajo Nation, which straddles Utah and New Mexico, observes DST, but the Hopi Reservation is entirely within Arizona and therefore does not observe DST.

As DST comes forward, Arizona will be out of sync with the rest of the Mountain Time Zone. It observes the same time as California and other Pacific time zone states.

If you’re trying to schedule a call or Zoom meeting with a colleague or family member on the East Coast, the time difference will be 3 hours instead of 2 hours in winter.

Mind you, this is “summer time”, not “summer time”.