Open Settings and find the time zone control

Your iPhone's time zone setting lives in the main Settings app, not in the Clock app. Open Settings, scroll down to find General, tap it, then look for Date & Time. This is where you control whether your phone automatically adjusts to your location or stays locked to a single time zone.

The exact location of this menu is the same on all recent iPhone models running iOS 15 or later. If you cannot find Date & Time under General, your phone may be running an older version of iOS — in that case, the menu structure is slightly different, but Date & Time will still be in Settings > General.

Key Takeaways

  • Time zone settings are in Settings > General > Date & Time, not in the Clock app.
  • Turning off "Set Automatically" lets you pick a single time zone that stays the same even when you travel.
  • Leaving "Set Automatically" on makes your phone change time zones based on your location, which requires Location Services to be enabled.
  • If you turn off automatic time zone adjustment, you must manually select your time zone from a list organized by region and city.
  • Your iPhone's time zone setting affects when alarms go off, when calendar events appear, and what time is shown on your lock screen.

Turn off automatic time zone adjustment

By default, your iPhone has Set Automatically turned on. This means your phone watches your location and changes the time zone on its own whenever you cross into a new one. If you want to lock your phone to a single time zone — for example, if you work remotely for a company in another time zone — you need to turn this toggle off.

Tap the toggle next to "Set Automatically" to turn it off. Your phone will stop using Location Services to track your time zone. Once you do this, a new option called Time Zone will appear below it, and you can tap that to choose which time zone you want to stay in.

Manually select your time zone

After you turn off "Set Automatically," tap the Time Zone option. Your iPhone will show you a list of time zones organized by region — for example, "America/New_York," "Europe/London," "Asia/Tokyo." Scroll through the list and tap the one that matches where you want your phone's clock to be set.

If you are not sure which time zone you need, look for the city nearest to you in the list. Each entry shows both the region and a major city in that time zone, so "America/Chicago" will also show "Chicago" next to it. Once you tap your choice, your phone locks to that time zone and will not change it automatically, even if you travel.

Turn automatic time zone back on if you travel frequently

If you travel often and want your phone to adjust automatically, go back to Settings > General > Date & Time and turn Set Automatically back on. Your phone will then use your location to set the correct time zone wherever you are. This requires Location Services to be enabled in your privacy settings.

When Set Automatically is on, your phone checks your location in the background and updates the time zone without asking you. You do not have to do anything — the change happens silently. If you notice your time zone is not updating even though Set Automatically is on, check that Location Services is turned on by going to Settings > Privacy > Location Services and making sure it is enabled.

Understand what changes when you adjust your time zone

Changing your time zone affects several things on your phone at once. Your lock screen clock, your Calendar app, and any alarms you have set will all shift to the new time zone. If you have an alarm set for 7 a.m. and you change your time zone, that alarm will still go off at 7 a.m. in the new time zone — not at the same moment it would have in the old one.

Calendar events work the same way. If you have a meeting scheduled for 2 p.m. and you change time zones, the meeting will now show as 2 p.m. in your new time zone. This can be confusing if you are joining a call with people in another time zone, so many people keep their phone set to their home time zone and use a world clock app instead to track other times.

Use the World Clock if you need to track multiple time zones

If you need to know what time it is in several different places, do not change your main time zone setting. Instead, open the Clock app and tap the World Clock tab at the bottom. Tap the plus sign to add cities, and your phone will show you the current time in each one without changing your phone's actual time zone.

This is much more practical than switching your time zone back and forth. Your alarms, calendar, and notifications stay tied to your home time zone, but you can glance at the World Clock tab anytime to see what time it is in Tokyo, London, or anywhere else you need to track.

Frequently Asked Questions

Why does my time zone keep changing even though I turned off Set Automatically?

If you turned off Set Automatically but your time zone still changes, check that you actually saved the setting. Go back to Settings > General > Date & Time and confirm the toggle is off. If it is off and your time zone is still changing, restart your phone — sometimes the setting does not take effect until you do.

Will my alarms go off at the right time if I change my time zone?

Yes. If you set an alarm for 7 a.m. and then change your time zone, the alarm will still go off at 7 a.m. in the new time zone. The alarm time stays the same in your phone's display, but it is now tied to the new time zone you selected.

Can I set different time zones for different apps?

No. Your iPhone has one time zone setting that applies to the entire phone. All apps — Calendar, Clock, Mail, Messages — use the same time zone. If you need to track multiple time zones, use the World Clock feature in the Clock app instead.

What happens to my calendar events when I change time zones?

Calendar events shift to match your new time zone. If you have a 2 p.m. meeting and you change your time zone, it will now show as 2 p.m. in the new zone. If you work across time zones, it is often better to keep your phone in your home time zone and use the World Clock to track other times.