The fastest way to change your iPhone's time
Open Settings, tap General, then Date & Time. Toggle off Set Automatically if it is on. Tap the time display and use the plus and minus buttons to set the hour and minute you want. When you are done, tap Back and the change takes effect when ready.
If you leave Set Automatically on, your iPhone pulls the time from your carrier or Wi-Fi network and ignores any manual changes you make. Turning it off is the only way to set a custom time. Your phone will keep that time even after you restart it, unless you turn Set Automatically back on later.
Key Takeaways
- Go to Settings > General > Date & Time and turn off Set Automatically to change the time manually.
- Use the plus and minus buttons next to the time field to adjust hours and minutes one at a time.
- If Set Automatically is on, your iPhone ignores manual time changes and syncs with your network instead.
- Changing the time affects alarms, reminders, and any app that uses your phone's clock, so verify the time is correct before leaving the settings.
Why your iPhone might not let you change the time
Set Automatically is on by default on most iPhones. When this toggle is active, your phone locks the time and will not let you edit it manually — the plus and minus buttons will be grayed out or unresponsive. This is a safety feature to prevent accidental time changes that could break alarms, calendar events, and app notifications.
To unlock manual time control, you must turn off Set Automatically first. Once you do, the time field becomes editable and you can adjust it. If you do not see the toggle at all, check that you are in Settings > General > Date & Time and not in a different menu.
Step-by-step instructions for manual time adjustment
Step 1: Open the Settings app on your home screen. It is the gray icon with white gears.
Step 2: Scroll down and tap General. It is usually near the top of the list.
Step 3: Tap Date & Time. You will see the current date and time displayed.
Step 4: Look for the toggle next to Set Automatically. If it is green (on), tap it once to turn it off. The toggle will turn gray.
Step 5: Tap the time display below. A picker wheel will appear with hour and minute fields.
Step 6: Tap the hour field and use the plus button above it to increase the hour, or the minus button below it to decrease it. Repeat for the minute field.
Step 7: Tap Back or swipe left to close the time picker. Your new time is now set.
What happens when you change the time manually
Changing your iPhone's time affects every app and service that relies on your phone's clock. Alarms will go off at the new time you set, not the actual time. Calendar events, reminders, and scheduled messages will trigger based on your phone's clock, not real time. This can cause you to miss actual appointments or receive notifications at the wrong moment.
If you set your time far in the past or future, some apps may behave unexpectedly. Subscriptions and trial periods tied to your phone's date may reset or expire. Banking apps and security features sometimes flag unusual time changes as suspicious activity. For these reasons, change your time only when necessary, and turn Set Automatically back on as soon as you are done.
Turning Set Automatically back on
Return to Settings > General > Date & Time and tap the toggle next to Set Automatically to turn it back on. The toggle will turn green. Your iPhone will reconnect to your carrier or Wi-Fi network and sync to the correct time within a few seconds. Any custom time you set will be overwritten.
Turning Set Automatically back on is the safest way to restore your phone to real time if you have been running it on a manual setting. Your alarms, reminders, and calendar will return to normal operation once the sync completes.
Time zone changes versus time adjustments
Changing your time zone is different from changing the time itself. Your time zone setting tells your iPhone what region you are in, and it automatically adjusts the displayed time based on that region. If you travel, you can change your time zone in the same Date & Time menu, and your phone will update the clock to match your new location.
If Set Automatically is on, your iPhone detects your time zone from your carrier or Wi-Fi network and updates it without you doing anything. If you turn Set Automatically off, you can also manually set your time zone by tapping the time zone field below the date and time picker. This is useful if your phone is not detecting your location correctly.
Frequently Asked Questions
Why does my iPhone keep changing the time back?
Your Set Automatically toggle is likely still on. Even if you change the time manually, turning this toggle on will override your change and sync to your network's time. Go back to Settings > General > Date & Time and make sure the toggle is off before adjusting the time.
Can I set a different time for different apps?
No. Your iPhone's system time applies to all apps at once. If you change the time, every app sees the same clock. Some apps let you set reminders or alarms for specific times, but those are based on your phone's clock, not independent timers.
What if I accidentally set the time to the wrong year?
Go back to Settings > General > Date & Time, turn off Set Automatically if needed, and adjust the date field to the correct year. If you want your phone to handle this automatically, turn Set Automatically back on and your phone will sync to the correct date and time from your network.
Does changing the time affect my battery or storage?
No. Changing the time does not use extra battery or storage. However, running your phone on an incorrect time for a long period can cause apps to behave oddly or miss scheduled tasks, so it is best to keep your time accurate.
Can I set the time to 12-hour or 24-hour format?
Yes, but that is a separate setting from the actual time. Go to Settings > General > Date & Time and look for 24-Hour Time. Toggle it on for 24-hour format (like 14:30) or off for 12-hour format (like 2:30 PM). This does not change the actual time, only how it is displayed.