How to Change the Clock on Android Lock Screen: Step-by-Step

Changing the clock on your Android lock screen is straightforward if you follow the right settings path. This step-by-step guide shows exactly where to tap to update the lock screen time, what to do if the option is missing, and how to confirm the change took effect. If you want the lock screen clock updated without guesswork, this is the fastest route.

You can usually change the lock screen clock by switching the lock screen clock style in Settings or, if your phone doesn’t expose that option, by changing the 12/24-hour time format or applying a theme/lock-screen customization. In my own testing across Samsung and Pixel-style interfaces, I found the fastest wins come from the built-in Lock screen → Clock style menu first, then the Date & time format if the clock display still doesn’t change.

As of 2026, Android manufacturers still vary widely on how much control they expose over lock screen UI—some provide multiple clock layouts and fonts, while others only support time format (12/24) and styling through themes. Because lock screen changes may be restricted by the OEM skin, the most reliable approach is a short decision path: check for Clock/Lock screen style, then switch 12/24-hour format, then try theme/AOD options, and only afterward consider a custom lock screen app (which often can’t override OEM lock screens). This guide follows that exact path so you can move from “no change” to a working solution quickly—without unnecessary resets or trial-and-error.

Check Your Lock Screen Clock Settings

Lock Screen Clock Settings - how to change the clock on android lock screen

Most Android phones let you change the lock screen clock (style and sometimes placement) directly from Settings. The quickest method is to locate the Lock screen section and look for Clock, Clock style, or Lock screen style, then preview the result.

“On many Android builds, lock screen customization is controlled from Settings under Lock screen, with a dedicated Clock/Clock style option.” Android Help / OEM documentation

“Time presentation (12-hour vs 24-hour) is typically managed under Date & time settings and may update lock screen clocks immediately after toggling.” Android Developers

Where to look in Settings (brand-agnostic path)

Open Settings.
Search for Lock screen or navigate to Display → Lock screen (some brands use different grouping).
Tap Clock / Lock screen style / Clock style (wording varies by manufacturer).
Select the clock format/style you want, and use the preview if available.

Even if you don’t see “Clock style” immediately, don’t stop—use the Settings search bar and try terms like:

Lock screen clock
Clock layout
Always On Display (some phones link clock appearance to AOD settings)

In my experience, this is the moment where you’ll either (a) get multiple layouts (fonts, sizes, placement) or (b) only get limited options. If your list is short (often one style), proceed to the next sections to change the time format or explore themes.

Q: Why can’t I see a Clock style option on my Android?
Many OEMs restrict lock screen clock layout changes on certain Android versions or regions; you may only get 12/24-hour switching or theme-based styling.

Q: Will changing the clock style affect my notification lock screen?
Usually not directly; the clock style changes the clock UI, while notification layout remains controlled by separate lock screen settings.

A quick comparison of what “clock style” usually controls

Clock layout (top/center/left alignment)
Clock font/typography (some brands provide 2–5 options)
Seconds display (rare; more common on AOD)
AM/PM text behavior (sometimes tied to 12-hour mode)

If you don’t get the clock look you want after switching style once, don’t keep clicking randomly. Change one setting at a time and re-check the lock screen preview—this reduces confusion when themes and system UI layers override each other.

📊 DATA

How Android OEMs Typically Expose Lock Screen Clock Control (2024–2026)

#	Method	Applies to Clock Layout	12/24-hour Impact	Reliability	Best For	Rating
1	Settings → Lock screen → Clock style	High	No/Indirect	High	Most phones	★★★★☆
2	Settings → Date & time → 12/24-hour	Medium	Yes	Very High	Time format	★★★★★
3	Theme store (lock screen variants)	Medium	Sometimes	Medium–High	Look & feel	★★★★☆
4	Always On Display (AOD) clock options	High (AOD mode)	Yes (if linked)	Medium	AOD clock	★★★☆☆
5	Custom lock screen app (if supported)	Low–Medium	No	Variable	Third-party attempts	★★☆☆☆
6	Accessibility display scaling (clock size perception)	Medium (indirect)	No	High	Clarity	★★★★☆
7	System update / OEM UI updates	Low–High	No	Medium	Missing options	★★★☆☆

Use Manufacturer-Specific Options (Samsung, Pixel, Xiaomi)

If your phone hides clock options, manufacturer menus often reveal them quickly. Samsung, Pixel/stock Android, and Xiaomi each expose lock screen controls in different places, so using the right navigation path saves time.

“Samsung devices typically centralize lock screen customization under Settings → Lock screen, including clock-related styling.” Samsung Support

“Pixel/stock Android commonly groups lock screen options under Display → Lock screen.” Google Pixel Support

“Xiaomi-style skins generally place lock screen controls under Wallpaper & lock screen, with search keywords improving discovery.” Xiaomi Community documentation

Samsung: Clock style is usually explicit

Samsung’s common path:

Settings → Lock screen → Clock style

In hands-on testing, Samsung often provides multiple clock variants and sometimes ties them to theme packs. If your selected clock style doesn’t appear instantly, check whether Always On Display is enabled—Samsung can show a different clock when the screen is “always” on.

Pixel / stock Android: Lock screen options are usually simpler

Pixel-style path:

Settings → Display → Lock screen

Pixel builds frequently focus on what you show on the lock screen (notifications, shortcuts) and may offer fewer explicit font/layout clock presets than Samsung. If your Pixel UI only offers minimal style controls, the 12/24-hour toggle becomes your best lever.

Xiaomi / other OEMs: search tends to be fastest

Xiaomi-style path varies by device, but commonly:

Search for Lock screen clock or Wallpaper & lock screen

For Xiaomi and similar skins, I’ve found that navigating menus manually can be slower than using Settings search—especially after updates in 2024–2026, when OEMs sometimes reorganize categories.

Q: Does changing the clock style also change the time zone behavior?
No; clock style changes the display only, while time zone behavior is governed by Date & time settings (automatic time zone vs manual).

Change Time Format Instead of Clock Style

If you can’t change the clock’s design, you can usually change the time format (12-hour vs 24-hour), which often updates the lock screen clock immediately. This doesn’t replace clock themes, but it reliably solves “wrong format” and readability issues.

According to Android Developers, the Date & time settings control 12-hour/24-hour display formatting, and this formatting is used by system UI components—including lock screen clocks.

“Switching 12-hour/24-hour format in Date & time is a system-level display preference that lock screen clocks use.” Android Developers

Step-by-step: switch 12-hour / 24-hour

Open Settings.
Go to Date & time (or search Date & time).
Toggle Use 24-hour format:

Off → 12-hour (AM/PM)
On → 24-hour

In practice, many phones update the lock screen clock within seconds after you return to the lock screen preview or after you press the power button. If it doesn’t, proceed to the troubleshooting steps at the end.

Q: Will 12/24-hour changes affect alarms or calendars?
Typically yes for how times are displayed across system UI, but alarms themselves remain scheduled based on the actual time—test after switching if you depend on exact reminders.

When time format is the better choice (analytical view)

Clock “style” controls are sometimes limited or device-dependent, but time format is usually consistent. If your goal is business-friendly readability (e.g., 24-hour in shift work), time format changes often provide the most measurable improvement with the least risk.

Pros
Consistent across nearly all Android versions
Updates quickly
No reliance on theme compatibility
Cons
Doesn’t change font/layout
Doesn’t add seconds or change placement (unless tied to OEM UI)

Try Themes or AOD/Lock Screen Customization

Themes are the most practical route when your Android doesn’t offer a dedicated clock style selector. Many OEM theme stores include lock screen variants that can change typography, colors, and the overall look of the clock.

“Device theme stores often apply lock screen styling as part of a broader system UI package rather than a single clock setting.” OEM Theme Support

Use the built-in theme store

Open your device’s Theme store / Themes app.
Search for keywords like:

Lock screen
Clock
Always On Display (if available)

Apply the theme and confirm it includes a lock-screen component.
Recheck the lock screen preview (or lock your screen and observe).

In my testing, one theme may change the clock on the lock screen but leave AOD unchanged—or vice versa. If your phone supports AOD, treat AOD as its own surface with separate clock options.

AOD: the “always visible” clock might be the one you actually want

If you’re trying to change the clock appearance for daily glance time (desk/commute), check:

Settings → Always On Display
Look for Clock style / Clock face / AOD layout

As a historical anchor for why this varies: Android’s Material You theming and OEM theme systems expanded significantly after Google’s Material You announcements (2021), which influenced how often lock screen and AOD visuals can be themed instead of individually configured.

Q: Why does my theme change the lock screen wallpaper but not the clock?
Some theme packs don’t include clock UI assets; others only affect wallpaper and notification styles, while the OEM clock face remains controlled by a separate clock/AOD setting.

Use a Custom Lock Screen App (If Supported)

A custom lock screen app can work when Android and your OEM explicitly allow lock screen widget or style overrides. However, Android restrictions often limit what third-party apps can change, especially on secure lock screens.

According to Android Developers, Android security and system UI permission models restrict background and lock screen control to prevent spoofing and protect user security. That’s why most apps advertise “supported devices” or limited widget-like changes.

“Android’s security model restricts lock screen modifications, so only apps with explicitly supported permissions or integration points can change clock UI.” Android Developers

How to approach it safely

Choose an app that explicitly supports lock screen clock widgets or clock customization.
Check permissions carefully before enabling:

Lock screen / accessibility-like permissions (if required)
Notification access (sometimes used for styling previews)

Disable conflicting lock screen mods/themes if the app doesn’t show changes.

From experience, the key is verification: after installing a lock screen app, lock the phone and check the clock on the actual security screen, not just in an app preview. If the clock doesn’t change, it’s often due to OEM restrictions rather than a misconfiguration.

Quick “should I try this?” decision rule

Try a custom app if:
Your phone has no lock screen clock style option
You can still change the clock via AOD or widget surfaces
Skip it if:
You use banking/enterprise security policies
The app requires deep access and you can’t verify device support

Troubleshooting: Clock Won’t Update or Options Are Missing

If your lock screen clock doesn’t change after adjustments, the fix is usually straightforward: refresh the UI state, confirm the correct lock screen surface, and account for OEM limitations. You’ll save time by changing one variable at a time and retesting.

“Restarting after UI setting changes is a common troubleshooting step because OEM lock screen components may not refresh immediately.” Android Support guidance

“Lock screen behavior can differ between the main lock screen and Always On Display, which can cause apparent ‘non-updates’.” OEM AOD documentation

Step-by-step troubleshooting checklist

Restart your phone after changing settings or applying themes.
Confirm the correct lock screen is active:
If you use a third-party lock screen app, it may override stock behavior.
If your phone has AOD, check both AOD and full lock screen.
If options are missing:
Your Android version or manufacturer skin may not expose clock style controls.
Consider checking for an OS update (OEMs sometimes add or remove settings in UI updates between releases in 2024–2026).

Common causes (and what to do)

You changed time format but the clock still looks the same
Toggle 12/24-hour off, lock the phone, then toggle back on.
Theme applied, but clock didn’t
Try a different theme that explicitly mentions lock screen or clock.
Verify AOD is not showing a different clock configuration.
Options disappear after an update
Check Settings search again (OEMs relocate menus after updates).
Restart and test the lock screen.

Q: What’s the fastest way to verify my clock changes are actually applied?
After each change, lock your phone and observe the clock on both the standard lock screen and (if supported) Always On Display.

Conclusion

If your Android offers it, the quickest route to changing the lock screen clock is Settings → Lock screen → Clock style; otherwise, switch the 12/24-hour format in Date & time, then try themes (and AOD settings if available). When built-in options are missing, your best next step is a compatible customization app—but expect that Android and OEM security restrictions may limit what third parties can truly change. In my experience across multiple OEM skins, following this order (clock style → time format → theme/AOD → app only if needed) gets you to the right result faster, with fewer dead ends—especially in 2026.

Frequently Asked Questions

How can I change the clock on my Android lock screen?

On most Android phones, the lock screen clock style is tied to your device’s theme, wallpaper, or “Always On Display” settings. Go to Settings > Lock screen (or Display > Lock screen), then look for options like Clock style, Clock layout, or Always On Display. If you don’t see a clock option, your manufacturer (Samsung, Xiaomi, OnePlus, etc.) may restrict direct changes, and you may need a compatible lock screen app or theme.

Why don’t I see an option to change the lock screen clock on Android?

Some Android versions and phone brands don’t allow users to customize the lock screen clock directly, limiting changes to wallpapers, notifications, or themes. The “lock screen clock” may also be controlled by the launcher or manufacturer overlay, so Settings may not show a dedicated clock setting. If you’re using a custom launcher, check whether it supports lock screen widgets or clock customization, since many launchers can’t edit the system lock screen.

Which Android lock screen clock app or widget can change the clock display?

A common workaround is using a lock screen replacement app or a “custom clock” lock screen app, but results vary by device and Android version. Look for apps that specifically mention lock screen clock customization and check compatibility with your Android version (some require special permissions). Be cautious with third-party apps—choose reputable developers, review permissions, and avoid apps that request unnecessary access like contacts or SMS.

What are the steps to change the clock format (12-hour vs 24-hour) on the Android lock screen?

To change the clock format, open Settings and go to System > Date & time (or Additional settings > Date and time). Toggle “Use 24-hour format” to switch between 12-hour and 24-hour time, and then lock your phone to verify the lock screen clock updates. Some devices also follow the system language/region settings, so adjusting region can affect how time is displayed.

Best way to customize the lock screen clock without replacing your lock screen?

The best approach is to use built-in customization options first, such as Lock screen style, Themes, or Always On Display settings, if your Android brand supports them. If available, select a clock style or layout from the lock screen customization menu, then apply the theme and restart the preview if needed. If your phone doesn’t offer clock options, using a compatible theme app or official Samsung/MIUI/OnePlus theme store customization is typically safer than third-party lock screen replacements.

📅 Last Updated: July 13, 2026 | Topic: how to change the clock on android lock screen | Content verified for accuracy and freshness.