Samsung AOD stuck on 24-hour time? How to fix it (One UI 9)

howtosimply.com/guides/samsung-galaxy-always-on-display-stuck-on-24-hour-time-fix/ · Checked October 2026 · SM-A576B), One UI 9, Android 17 (build A576BXXU6BZIE · Samsung Galaxy A57

6 of 6 steps with real screenshots · 3 official sources below

Device

Android

Shown on

Samsung Galaxy A57 (SM-A576B), One UI 9, Android 17 (build A576BXXU6BZIE)

App

Settings

Path

Settings › General management › Date and time

Real screenshots

6 of 6 steps

Checked

October 2026

Sources

3 official, linked below

Step by step

1. 

   Open the Always On Display page

   Open Settings, tap Lock screen and AOD, then tap the words Always On Display, not its switch.

   Done

2. 

   Check the clock in the preview

   The page shows On, a preview, Show Now bar and When to show. Ours read 19 36 over Mon, October 26 in the preview, and there was no clock-format row anywhere on the page.

   Done

3. 

   Open Date and time

   Go back to Settings and tap General management, then Date and time. Use 24-hour format is the last row; ours was on and showed 13:00 below it.

   Done

4. 

   Turn off Use 24-hour format

   Tap the switch. The example below the row changes to 1:00 PM and the status bar clock drops to 7:37.

   Done

5. 

   Check the AOD preview

   Open Lock screen and AOD, Always On Display again. Our preview now read 07 37 over Mon, October 26, instead of 19 37.

   Done

6. 

   Want 24-hour time back? Turn it on

   Tap Use 24-hour format again. The example goes back to 13:00. We did not reopen the AOD page after this, but it follows the same switch.

   Done

If you do not see this option

• No clock option on the AOD page? That is how One UI 9 looks. Samsung says that on One UI 6 or later the AOD uses the same clock style as the Lock screen; the 12 or 24-hour format comes from Date and time. Source: Always On Display on your Galaxy phone or tablet
• Same on the Galaxy S26? Our Galaxy S26 with One UI 9 also had no clock-format row on its Always On Display page; its preview showed 08:31. We did not test its 24-hour switch.

  

• Cannot find Date and time? Samsung lists it under Settings, General management, Date and time, with the switch next to Use 24-hour format. Source: Change the date and time on your Galaxy phone or tablet.

If this does not work

• Clock shows the wrong hour, not the wrong format? Use 24-hour format only changes how the time looks. Automatic date and time and Automatic time zone, at the top of the same page, set the time itself; both were on on ours. Source: Change the date and time on your Galaxy phone or tablet.

  

• AOD does not stay on? When to show was set to Tap to show on ours. Samsung says Tap to show makes the Always On Display appear for a short time after you tap the screen. Source: Always On Display on your Galaxy phone or tablet

  

About this guide

On One UI 9 the Always On Display page only has the On switch, a preview, Show Now bar and When to show. There is no 12-hour or 24-hour choice there, so the AOD clock copies the format of the phone's clock.

The screenshots are from our Samsung Galaxy A57 (SM-A576B) with One UI 9.0 and Android 17 (build CP2A.260605.016.A576BXXU6BZIE), in Dark mode, taken on 26 October 2026. We turned Use 24-hour format off for the pictures and then back on.

Good to know

If the time itself is off, see Samsung Galaxy showing the wrong time or date. To switch the AOD off, see turn Always On Display on or off.

In short: Settings, General management, Date and time, Use 24-hour format: off for 12-hour, on for 24-hour. The AOD follows it.

📷 See real photos from the Galaxy A57 in our Camera Lab, next to 10 other phones.