Will your iPhone change time tonight?

Most US clocks go back one hour on Nov. 1.

Check one setting

Settings → General → Date & Time → Set Automatically.

Early alarm tomorrow?

Confirm the alarm day and local time before bed.

Traveling overnight?

Check your departure and arrival time zones.

Arizona or Hawaii?

Most residents there do not change clocks.

If time looks wrong

Reconnect, restart, and check the time zone.