The quickest way to change your date and time

Open the Settings app by pressing Windows key + I, then go to Time & language in the left menu. Click Date & time. If you want Windows to set the time automatically, toggle Set time automatically to on. To change it yourself, toggle that setting off, then click the fields under Set the date and time manually to enter the correct date and time.

The entire process takes about 30 seconds. If your clock is way off—more than a few hours—Windows may have lost sync with the internet time server, which happens occasionally after a long shutdown or network outage. Turning automatic sync back on usually fixes it within a minute.

Key Takeaways

  • The Settings app is the standard way to change date and time on Windows 11, accessed through Windows key + I and then Time & language.
  • Automatic time sync is on by default and pulls the correct time from Microsoft's servers, so you only need to change it manually if you want a different time zone or have a specific reason.
  • If you turn off automatic sync, you can type in the date and time directly using the manual entry fields.
  • The system clock affects when files are timestamped, when scheduled tasks run, and whether security certificates are considered valid.

Using automatic time sync (the easiest option)

By default, Windows 11 syncs your clock with time servers on the internet. This means your date and time should always be correct as long as you are connected to the internet. You can check whether this is turned on by opening Settings, going to Time & language, then Date & time, and looking at the Set time automatically toggle.

If the toggle is already on (blue), your time is being managed automatically and you do not need to do anything. If it is off (gray), click it to turn it back on. Windows will sync within a few seconds. This is the best option for most people because it means you never have to think about it again, even if you travel to a different time zone—Windows can update that automatically too if you enable Set time zone automatically.

Changing the date and time manually

If you need to set a specific date or time—for example, if you are testing software that depends on the system clock, or if you are in an environment without internet access—you must turn off automatic sync first. Open Settings, go to Time & language and Date & time, then toggle Set time automatically to off.

Once that toggle is off, two new fields appear: Set the date and Set the time. Click on the date field and a calendar picker opens. Click the month and year at the top to jump to a different month quickly, then click the day you want. For the time, click the time field and type the hour, minute, and second directly. Use 24-hour format (so 2 p.m. is 14:00). After you enter both, Windows saves the change when ready.

Be aware that if you turn off automatic sync, your clock will drift slightly over time because computer clocks are not perfectly accurate. If you leave it off for weeks, you may notice the time is a few minutes off. Turn automatic sync back on whenever you no longer need manual control.

Changing your time zone

Your time zone setting tells Windows what offset to use from Coordinated Universal Time (UTC). If you move to a different region or want to display time in a different zone, scroll down in the Date & time settings to find Time zone and click the dropdown menu.

A list of time zones appears, organized by region. Type the name of your city or region to filter the list—for example, typing "Denver" will show you Mountain Time. Click the one you want. If Set time zone automatically is turned on, Windows will try to detect your location and update this for you, but you can always override it by choosing manually.

What to do if the time keeps changing back

If you set the time manually but it reverts to a different time after a restart, automatic sync is likely still on. Go back to Time & language and Date & time, and confirm that Set time automatically is toggled off. If it is already off but the time still changes, your computer may be syncing through a domain controller if you are on a work network—in that case, contact your IT department because they may have locked this setting.

Another reason the time might jump is if your computer's internal battery (the CMOS battery) is dying. This battery keeps the system clock running even when the computer is unplugged. If the time resets to a very old date every time you restart, the battery may need replacement, but this is rare on modern machines. In that case, you would need to contact a repair technician.

How the system clock affects your computer

The date and time setting is not just for display—it controls when files are timestamped, when scheduled tasks run, and whether security certificates are considered valid. If your clock is set to a date far in the past, Windows may refuse to install updates or connect to find websites because it thinks the security certificates have expired. If your clock is set far into the future, the opposite can happen.

This is why automatic sync is the default. It keeps your system clock accurate without any effort on your part, which prevents these kinds of problems. If you must set the time manually, try to keep it within a day or two of the actual time.

Frequently Asked Questions

Can I set a different time zone without changing the actual time?

Yes. The time zone setting and the actual time are separate. You can change your time zone in the Time zone dropdown without touching the date and time fields. Windows will display the time correctly for that zone.

What if I do not know my time zone?

Click the Time zone dropdown and type your city name. Windows will show you the correct zone. If you have Set time zone automatically turned on, Windows will detect your location and set it for you, though this requires location services to be enabled.

Does changing the time affect my files or programs?

Changing the time can affect file timestamps going forward—new files will be stamped with the time you set. It can also cause scheduled tasks to run at unexpected times if you set the clock far into the past or future. Automatic sync prevents this problem.

Why does Windows say "Set time automatically" is on but the time is still wrong?

Windows may not have synced yet, or your internet connection may be down. Try restarting your computer, or manually sync by going to Settings > Time & language > Date & time and scrolling down to click Sync now if that button appears.

Can I change the time format from 24-hour to 12-hour?

Yes. In Settings, go to Time & language and click Language & region. Scroll down and click Related settings under Administrative language and regional formats, then change the time format in the dialog that opens.