The fastest way to adjust your device's time

Most devices let you change the time in Settings, usually under a section called Date & Time or similar. The exact path depends on what you're using — a phone, computer, or tablet — but the principle is the same: find the time setting, turn off automatic time adjustment if it's on, and type in the correct time.

Before you start, know that many devices sync time automatically with your internet connection or carrier. If you just want the time to be right, turning on automatic time is usually faster than setting it manually. But if you need to set it yourself — because you're in a new timezone, your device is offline, or you want a specific time for testing — the manual path takes about two minutes.

Key Takeaways

  • Most devices have automatic time turned on by default, which syncs with your network or carrier and usually keeps the time correct without you doing anything.
  • To change the time manually, go to Settings, find Date & Time, turn off automatic adjustment, and enter the time you want.
  • If you change timezones, your device may update automatically if automatic time is on, but you can also set the timezone manually in the same menu.
  • The time setting is usually in the same place as the date and timezone settings, so you can adjust all three at once.

Where to find the time setting on your phone

On an iPhone, open Settings, tap General, then Date & Time. You'll see a toggle for "Set Automatically" — turn it off if you want to set the time yourself. Once it's off, the "Time" field becomes editable. Tap it and use the scroll wheels to set the hour and minutes, then tap Set.

On an Android phone, the path varies slightly by manufacturer. Go to Settings, look for System or About Phone, then find Date & Time. You should see a toggle for "Automatic date and time" or "Use network-provided time" — turn it off. Then tap "Set time" and enter the time you want. Some Android phones also let you set the time by tapping and dragging on a clock face instead of typing numbers.

How to adjust time on a computer

On Windows, right-click the time in the bottom right corner of your screen and select "Adjust date and time." This opens the Date & Time settings. Look for "Set time automatically" — if it's on, turn it off. Then click "Change" under "Set the date and time" and enter the time you want. Click OK to save.

On a Mac, go to System Settings (or System Preferences on older versions), click General, then Date & Time. You'll see a checkbox for "Set date and time automatically" — uncheck it. Then click the lock icon if it's locked, enter your password, and you can manually set the time by clicking on the time display and typing in the new time.

What automatic time does and why it matters

When automatic time is on, your device talks to a time server — usually run by your internet provider, your phone carrier, or a public time service — and syncs its clock to match. This happens in the background without you noticing. The advantage is that your time stays accurate even if your device's internal clock drifts, and it updates automatically when you cross into a new timezone.

The downside is that you can't set a custom time while automatic time is on. If you need to test something that depends on a specific time, or if you're offline and your device's clock is wrong, you'll need to turn automatic time off first. Just remember to turn it back on afterward, or your time may drift again over weeks or months.

Changing your timezone separately from the time

Your timezone setting tells your device what region you're in, and it uses that to display the correct local time. If you travel to a new timezone and automatic time is on, your device usually updates the timezone automatically and adjusts the displayed time to match. If automatic time is off, you need to change the timezone manually in the same Date & Time menu.

On iPhone, the timezone setting is in Settings > General > Date & Time, under "Time Zone." On Android, it's usually in Settings > System > Date & Time > Time Zone. On Windows, it's in Settings > Time & Language > Date & Time > Time Zone. On Mac, it's in System Settings > General > Date & Time > Time Zone. Changing the timezone doesn't change the actual time on your device — it just changes how that time is displayed.

Why your device's time might be wrong

If your device shows the wrong time even though automatic time is on, the most common cause is that your device can't reach a time server. This happens when you're offline, when your internet connection is unstable, or when your phone carrier's network is having problems. Turning automatic time off and on again sometimes forces a refresh. You can also try restarting your device, which often reconnects it to the network and syncs the time.

If automatic time is off and you set the time manually, your device's internal clock may drift over time — especially on older devices or if the battery is very low. This is why automatic time exists. If you find yourself resetting the time frequently, turning automatic time back on is usually the better solution than setting it manually every few days.

Frequently Asked Questions

Will changing the time affect my alarms or scheduled tasks?

Yes. If you set the time backward, an alarm that was supposed to go off in five minutes might not go off at all. If you set the time forward, an alarm might go off immediately. Scheduled tasks like backups or app updates may also run at unexpected times. Change the time only when you need to, and check your alarms and schedules afterward.

Can I set the time to something that doesn't exist, like 25:00?

No. Your device won't let you enter an invalid time. The hour field accepts 0 to 23 (or 1 to 12 if you're using 12-hour format), and the minute field accepts 0 to 59. If you try to enter something outside those ranges, the field will reject it or reset to the nearest valid time.

What happens if I turn off automatic time and never turn it back on?

Your device's internal clock will slowly drift, and the time will become increasingly wrong over weeks or months. Eventually it may be off by hours. Turning automatic time back on will sync it again. If you need to keep automatic time off for a specific reason, you'll need to manually reset the time periodically.

Does changing the time on my device affect the time on other devices?

No. Each device has its own internal clock and time setting. Changing the time on your phone won't change the time on your computer, tablet, or smart watch. They sync independently with their own time servers (if automatic time is on) or stay at whatever time you set them to (if automatic time is off).