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How to Change Lock Screen Clock to 12 hour or 24 hour Format in Windows 10

information   Information
The lock screen is the screen you see when you lock your PC (or when it locks automatically after you haven't been using it for a while). The lock screen will also show at startup, and when you are signed out and idle for one minute. You will need to dismiss the lock screen to be able to see the sign in screen and sign in to Windows. Users can dismiss the lock screen using touch, the keyboard, or by dragging it up with the mouse.

The clock on the lock screen displays time in a 12 hour format by default.

This tutorial will show you how to change the lock screen clock to 12 hour or 24 hour (aka: military time) time format in Windows 10.


CONTENTS:
  • Option One: To Change Clock to 12 hour or 24 hour Time Format on Current User Lock Screen
  • Option Two: To Change Clock to 12 hour or 24 hour Time Format on Default Lock Screen


EXAMPLE: 12 hour and 24 hour clock on lock screen
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Change Lock Screen Clock to 12 hour or 24 hour Format in Windows 10 OPTION ONE Change Lock Screen Clock to 12 hour or 24 hour Format in Windows 10
To Change Clock to 12 hour or 24 hour Time Format on Current User Lock Screen

Note   Note
This is the lock screen that shows when a user account locks the computer while signed in to Windows 10.

This option will only affect your account (current user).


1. Do step 2 (12-hour) or step 3 (24-hour) below for what you would like to do.


 2. To Change Lock Screen Clock to 12 hour Time Format for your Account

A) Change the time format for long time to h:mm:ss tt. (see screenshots below)

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 3. To Change Lock Screen Clock to 24 hour Time Format for your Account

A) Change the time format for long time to HH:mm:ss. (see screenshots below)

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Change Lock Screen Clock to 12 hour or 24 hour Format in Windows 10 OPTION TWO Change Lock Screen Clock to 12 hour or 24 hour Format in Windows 10
To Change Clock to 12 hour or 24 hour Time Format on Default Lock Screen

Note   Note
You must be signed in as an administrator to do this option.

This is the lock screen that shows when there are currently no user accounts signed in to Windows 10. For example, at Windows startup.


1. Open the Control Panel (icons view), and click/tap on the Region icon.


2. Do step 3 (12-hour) or step 4 (24-hour) below for what you would like to do.


 3. To Change Default Lock Screen Clock to 12 hour Time Format

A) Change the time format for long time to h:mm:ss tt, click/tap on Apply, click/tap on the Administrative tab, and go to step 5 below. (see screenshot below)

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 4. To Change Default Lock Screen Clock to 24 hour Time Format

A) Change the time format for long time to HH:mm:ss, click/tap on Apply, click/tap on the Administrative tab, and go to step 5 below. (see screenshot below)

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5. Click/tap on the Copy settings button. (see screenshot below)

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6. Check the Welcome screen and system accounts box, and click/tap on OK. (see screenshot below)

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7. Click/tap on OK. (see screenshot below step 5)

8. You can close the Control Panel if you like.


That's it,
Shawn