The quickest way to change your iPhone's date and time
Open Settings, tap General, then Date & Time. Toggle off "Set Automatically" if it's on, then tap the date and time fields to adjust them manually. If you want your phone to update automatically based on your location, leave "Set Automatically" turned on — your iPhone will sync with your carrier's time servers.
Most people never need to change the date manually. Your iPhone updates automatically when you move between time zones, and it syncs with Apple's time servers whenever you connect to the internet. The manual option exists mainly for people who need to set a specific date for testing purposes, or whose automatic sync isn't working correctly.
Key Takeaways
- Manual date changes are found in Settings > General > Date & Time, and require you to turn off "Set Automatically" first.
- Leaving "Set Automatically" on means your iPhone updates its time whenever you travel or your carrier updates their time servers.
- If your date or time is wrong even with automatic sync on, restart your phone or check that you're connected to Wi-Fi or cellular data.
- Some apps and features — like iCloud sync and app store updates — may not work correctly if your date is set far in the past or future.
When automatic time sync stops working
If your iPhone's date and time are wrong even though "Set Automatically" is on, the problem is usually a connection issue. Your phone needs either Wi-Fi or cellular data to reach Apple's time servers. Check that you're connected to one or the other, then restart your iPhone by powering it off and back on.
If restarting doesn't fix it, try toggling "Set Automatically" off and back on. This forces your iPhone to reconnect and resync. If the time is still wrong after that, check whether your carrier or Wi-Fi network is blocking the connection — this is rare but can happen on some corporate or school networks.
What happens when you set the date manually
Setting your iPhone's date to the past or future can cause problems with apps and services that rely on the correct date. iCloud sync may pause, the App Store may refuse to download updates, and some banking apps will lock you out. These protections exist because apps use the date to verify that certificates and security tokens are still valid.
If you've set the date manually for testing and now can't access an app, set the date back to today and restart the app. The app should reconnect once it sees the correct date again. If you're testing software and need to keep the date changed, do it on a test device rather than your main phone.
Changing the time zone without changing the date
If you only want to change your time zone — say, you're traveling and want your iPhone to show the local time — leave "Set Automatically" on. Your iPhone will detect your new location through Wi-Fi networks and cell towers, and update the time zone automatically. This usually happens within a few minutes of landing.
If automatic detection isn't working, you can manually set the time zone by going to Settings > General > Date & Time and tapping the time zone field. You don't need to turn off "Set Automatically" to do this — just tap the zone name and search for your destination city. Your iPhone will then show the correct local time for that zone.
Why your iPhone might show the wrong date after an update
Occasionally, after a major iOS update, your iPhone's date resets or syncs incorrectly. This usually fixes itself within a few minutes once your phone reconnects to the internet. If it doesn't, restart your phone and make sure you're connected to Wi-Fi or cellular data.
If the date is still wrong after a restart and a reconnection, check your iPhone's battery health — a phone with a failing battery sometimes loses track of time. Go to Settings > Battery > Battery Health & Charging. If the maximum capacity is below 80%, the battery may need replacement, which can be done at an Apple Store or authorized repair shop.
Using Siri to check or change the date
You can ask Siri "What's today's date?" to see what your iPhone thinks the current date is. Siri will read it aloud and display it on screen. This is a quick way to verify whether your phone's date is correct without opening Settings.
You cannot change the date through Siri — you'll still need to go to Settings > General > Date & Time to make manual adjustments. But Siri is useful for confirming the date at a glance, especially if you're checking whether your automatic sync worked after traveling.
Frequently Asked Questions
Will changing the date affect my alarms or reminders?
Yes. If you set the date to the past, alarms and reminders scheduled for today or tomorrow won't trigger until the date catches up. If you set the date far into the future, alarms scheduled for today will have already passed. Set the date back to today to restore normal behavior.
Can I set different dates for different apps?
No. The date you set in Settings applies to your entire phone and all apps on it. Every app sees the same system date. If you need different dates for different purposes, you'll need separate devices or accounts.
What if my iPhone keeps resetting the date to a wrong time?
This usually means your phone can't reach a time server to sync. Check that Wi-Fi or cellular is on and working. If both are on and the date still resets, restart your phone. If it persists, your carrier or network may be blocking the connection — contact your carrier's support line.
Does changing the date drain my battery?
No. Changing the date uses almost no battery. However, if your battery is very low and your phone is struggling to stay on, avoid making changes that require opening Settings, as this can cause the phone to shut down unexpectedly.