How to Change Time Format in Windows 11 (12-Hour or 24-Hour)

If your taskbar clock is showing 13:00 instead of 1:00 PM (or the other way around) and you just want it to match what you’re used to, changing the time format in Windows 11 takes about a minute through Settings. I’ve done this on a handful of machines for people who got thrown off after a fresh install defaulted to the “wrong” format for their habits, and it’s one of the easier fixes in this OS — no restart, no admin rights, just a couple of clicks.

Quick Answer

Open Settings (Win + I) > Time & language > Language & region
Expand Regional format, click Change formats
Under Short time, pick a 12-hour option (h:mm tt) or 24-hour option (HH:mm)
The taskbar clock updates instantly — no sign-out needed in most cases

Change It Through Settings (Easiest Way)

This is the method most people should use.

Press Win + I to open Settings
Go to Time & language in the left sidebar
Click Language & region
Scroll down to Regional format, click the arrow to expand it
Click Change formats
Under Date and time formats, click the Short time dropdown
Choose:
- 9:40 AM or h:mm tt for 12-hour format
- 09:40 or HH:mm for 24-hour format
Optionally do the same for Long time if you want seconds shown with the matching format

That’s it. And yeah, it really is that simple — the taskbar clock should reflect the change as soon as you pick it.

Change It Through Control Panel (Older Method, Still Works)

Some people prefer this route, mostly out of habit from older Windows versions. It does the exact same thing under the hood.

Press Win + R, type control.exe, hit Enter
Set the view to Category (top right)
Click Clock and Region > Region
On the Formats tab, find Short time
Pick h:mm tt or hh:mm tt for 12-hour, or H:mm or HH:mm for 24-hour
Click Apply, then OK

Why the Clock Might Not Update Right Away

Most of the time the change is instant. But every so often the taskbar clock keeps showing the old format for a few seconds, or doesn’t budge at all until you do something else first. From what I’ve seen, this is almost always one of two things:

The Long time format wasn’t changed alongside Short time. If you only update one of the two dropdowns, some parts of the system (file timestamps, certain dialog boxes) can keep showing the format you didn’t touch, which makes it look like the change didn’t take.

Windows Explorer needs a nudge. Signing out and back in forces the shell to reload and pick up the new setting properly. You shouldn’t need a full restart, just a sign-out.

A Few Things Worth Knowing

This setting is per user account, not system-wide. If you’ve got multiple accounts on the same PC, each one needs to be set individually — there’s no single switch that applies it everywhere unless you go through the Control Panel’s “Copy settings” option for the sign-in screen, which is a separate step entirely from your own account’s clock.
The lock screen clock is controlled by the same regional format setting, so changing it here also updates what you see before you sign in — eventually. It can lag a bit longer than the taskbar clock does.
Some older or third-party apps manage their own time display and ignore your Windows regional settings completely. If an app’s clock still looks wrong after this, that’s the app, not Windows.
Want seconds on the taskbar clock too? That’s a separate toggle: Settings > Personalization > Taskbar > Taskbar behaviors > Show seconds in system tray clock. It works alongside whatever format you picked above, not instead of it.

FAQ

Why did my clock switch to 24-hour format on its own? Usually because the region setting changed — sometimes from a Windows Update, sometimes from picking a different region/language during setup without realizing it affects time format too.

Does this change the format everywhere, or just the taskbar? Both Short time and Long time settings apply system-wide for your account — taskbar, lock screen, File Explorer timestamps, most built-in apps. Third-party apps are the exception.

Do I need to restart my PC? No. A sign-out is sometimes enough if the clock seems stuck, but a full restart isn’t necessary.

Can I set a custom time format that’s not in the dropdown? Yes — click Additional settings in the Regional format screen and you can type in a custom format string manually.

Editor’s Opinion

genuinely one of the least painful settings to change in windows 11, no idea why it’s buried three menus deep though. if it doesn’t update right away just sign out and back in, don’t bother restarting the whole machine for this.