The fastest way to change your iPhone's time

Open Settings, tap General, then tap Date & Time. Toggle off the switch next to Set Automatically if it is on. Once you turn off automatic time-setting, you will see a Time Zone field and a field showing the current time. Tap the time field and use the scroll wheels to set the hour, minute, and AM or PM. When you finish, tap Back to save your changes.

If you leave Set Automatically turned on, your iPhone will pull the correct time from your cellular network or Wi-Fi connection and ignore any manual changes you make. This is why turning off that toggle is the first step — without it, your phone will override whatever time you set.

Key Takeaways

  • You must turn off Set Automatically in Settings > General > Date & Time before your iPhone will accept a manual time change.
  • Once automatic time-setting is off, tap the time field and use the scroll wheels to set hours, minutes, and AM or PM.
  • Changing your time zone separately from the clock time is possible — tap Time Zone to set your location without changing the actual time.
  • If you turn Set Automatically back on, your iPhone will reset to the network time and erase any manual adjustment you made.

Why your iPhone might not let you change the time

The most common reason is that Set Automatically is still enabled. When this toggle is on, iOS ignores the time field entirely and syncs with your carrier's network time or your Wi-Fi network's time. You cannot override it by tapping the time field — the field will appear grayed out or your changes will not stick.

A second reason is that you are in a managed device environment, such as a work iPhone set up through your company's mobile device management system. In that case, your IT department may have locked the time settings so you cannot change them. Contact your IT support to request a change.

Changing your time zone without changing the clock time

If you only need to update your time zone — for example, you traveled to a different state — you can change the time zone field without touching the clock time itself. Go to Settings > General > Date & Time, make sure Set Automatically is on, and tap Time Zone. Type the name of your city or region, and iOS will set the correct time zone and adjust your clock automatically.

If Set Automatically is off, you can still tap Time Zone and change it independently. This is useful if you want to keep a specific time on your clock but tell your iPhone you are in a different location — though most people do not need to do this.

Turning automatic time-setting back on

To let your iPhone set the time on its own again, go to Settings > General > Date & Time and toggle Set Automatically back on. Your phone will when ready sync with your network and overwrite whatever time you had set manually. This usually takes a few seconds.

Turning automatic time-setting back on is the safest option for most people, because your iPhone will always show the correct time without you having to remember to adjust it when you travel or when daylight saving time changes.

What happens when you change the time on your iPhone

Changing your iPhone's time affects when alarms go off, when reminders appear, and when scheduled messages send. If you set your time backward, you might trigger duplicate notifications or cause calendar events to appear at the wrong time. If you set your time forward, you might miss alarms or reminders that were scheduled for the time you skipped over.

Apps that depend on accurate time — such as banking apps, authentication apps that generate security codes, or fitness apps that track workouts — may behave unexpectedly if your clock is wrong. For this reason, manual time changes are usually only necessary for testing or troubleshooting, not for everyday use.

Changing the time format (12-hour vs. 24-hour)

If you want to change whether your iPhone displays time as 12-hour (with AM and PM) or 24-hour format, that is a separate setting. Go to Settings > General > Date & Time and look for Time Format near the bottom of the screen. Toggle it to switch between the two formats. This changes how the time appears throughout your phone — in the status bar, on your lock screen, in the Clock app, and in notifications.

The time format setting does not affect the actual time on your phone, only how it is displayed. Switching from 12-hour to 24-hour format (or vice versa) will not change any alarms, reminders, or scheduled events.

Frequently Asked Questions

Can I set my iPhone to a time that does not match my actual time zone?

Yes. Turn off Set Automatically, then set the clock to any time you want. Your time zone setting and your clock time are separate — you can have your phone think it is 3 p.m. while your location is set to New York. However, this will confuse your calendar, alarms, and any app that relies on accurate time, so it is not recommended for normal use.

Why does my iPhone keep changing the time back?

Set Automatically is still on. Go to Settings > General > Date & Time and make sure the toggle next to Set Automatically is off. If it is already off and your time keeps changing, restart your iPhone and check the setting again — sometimes the toggle does not save properly until you restart.

Does changing the time on my iPhone affect my backups or iCloud sync?

Changing the time does not delete or corrupt your backups. However, if your clock is significantly wrong, it may cause problems with iCloud sync, two-factor authentication, or apps that check timestamps. Once you set the correct time, these services will resume working normally.

What if I cannot find the Date & Time settings?

Make sure you are in the main Settings app, not a different app. Tap the gray gear icon on your home screen, then scroll down and tap General. Scroll down again and you will see Date & Time. If you still cannot find it, your device may be managed by your workplace or school — contact your IT department.