| Quick Answer |
| To change Apple Watch to military time, open the Watch app on your iPhone → tap My Watch → tap Clock → toggle on 24 Hour Time. The change applies within 1 to 2 minutes to your watch face, notifications, and calendar. No restart needed. Note: third party watch faces may not support 24 hour display , switch to a native Apple face if the change does not appear. |
Most people want to change Apple Watch to military time because 13:00 is always clearer than 1:00 PM. There is no AM/PM guessing and no mental math. Military time , also called 24 hour time , removes ambiguity from every glance at your wrist.
Learning how to change Apple Watch to military time takes under 30 seconds. Once you flip the toggle, the format applies across the entire watch: face, notifications, calendar events, alarms, and activity rings all update together.
Why Do People Switch to 24 Hour Time on Apple Watch?
Switching to 24 hour time on Apple Watch is most popular among healthcare workers, pilots, military personnel, and shift workers. These users read time quickly under pressure, and 24 hour format removes the AM/PM layer from every glance at the wrist.
Nurses, pilots, and night shift workers all rely on a format that counts straight from 00:00 to 23:59 with zero ambiguity. For everyday users, it also keeps time consistent with international standards used across Europe and Asia.
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How to Enable Military Time on Apple Watch (Step by Step)
The only official way to change Apple Watch to military time is through the Watch app on your paired iPhone. You cannot change this setting directly from the watch itself. Follow the steps provided below to complete the process.
Using the Watch App on iPhone (The Primary Method)
- Open the Watch app on your iPhone. This is the black app with a watch icon on your home screen.
- Tap “My Watch” at the bottom left of the screen to see your watch settings.
- Scroll down and tap “Clock.” This section controls all time display settings.
- Toggle on “24 Hour Time.” The switch turns green when active.
- Check your Apple Watch. The face updates within 1–2 minutes automatically.
| Pro Tip: Using the Watch app on iPhone is the only official way to change Apple Watch to military time. You cannot adjust this preference using Siri, the Control Center, or any quick shortcuts; you must configure it exclusively through the dedicated Watch app. Any third party app claiming to do it via the watch directly is using a workaround that may not be stable. |
The “Hidden” Gaps: Why Your Watch Might Not Show Military Time
Sometimes you change Apple Watch to military time correctly, but the watch still shows 12 hour format. This happens for three specific reasons that most guides never mention. Knowing these gaps saves you from restarting your watch or second guessing the steps.
The Sync Lag
After you toggle 24 Hour Time in the Watch app, the change travels from your iPhone to your Apple Watch over Bluetooth. This process usually takes 1 to 2 minutes, sometimes up to 3 minutes if Bluetooth signal is weak.
If the watch face still shows 12 hour time after 3 minutes, simply raise your wrist to wake the watch, or press the Digital Crown once to refresh the display. The updated format should appear immediately after the screen wakes.
Third Party Watch Face Limitations
This is the most overlooked reason why military time settings do not appear. When you change Apple Watch to military time, Apple’s native watch faces , like Modular, Infograph, and California , update instantly. Third party watch faces built by independent developers do not always follow the system toggle.
Some developers hard code a 12 hour format into their face design and never built in support for the 24 Hour Time setting. If your watch face is from a third party app and the time still shows 12 hour, switch to any built in Apple face temporarily to confirm the setting is working. Then report the issue to the face developer if you want to use their design with 24 hour time.
Standalone Watch / Family Setup
If your Apple Watch is set up as a standalone device through Family Setup , for a child or elderly family member without an iPhone , the paired family member’s iPhone controls all settings. The person wearing the watch cannot change it directly.
To change Apple Watch to military time in this case, the family organizer opens the Watch app on their own iPhone, selects the family member’s watch from the top of the My Watch tab, and follows the same Clock → 24 Hour Time steps. The change pushes to the standalone watch over cellular or WiFi within a few minutes.
How to Set Your Watch Face Ahead (The “Punctuality” Trick)
Apple includes a little known feature that lets you set your Apple Watch clock ahead by up to 59 minutes, so the displayed time runs fast while your alarms and notifications still fire at the correct real time. This is useful if you tend to run late and want a mental nudge.
To use it: open the Watch app on your iPhone → tap My Watch → tap Clock → tap the “+0 min” option under Set Watch Face Ahead. Drag the slider to add minutes. Your watch face will now show a time ahead of real time, but Siri, alarms, and calendar alerts will still trigger at the actual correct moment.
This trick works the same way whether you have changed Apple Watch to military time or kept the 12 hour format. The offset applies on top of whichever format is active.
Troubleshooting Common Issues
The table below covers the four most common problems people run into when they try to change Apple Watch to military time, along with the exact fix for each one.
| Issue | Cause | Fix |
| Toggle is greyed out | iPhone time managed by carrier | Turn off Set Automatically in Date & Time |
| Watch shows 24 hr, iPhone shows 12 hr | Settings not synced | Enable 24 Hour Time on iPhone too |
| Change not showing | Sync lag (1 to 2 min) | Raise wrist or restart watch face |
| Third party face unchanged | Developer limitation | Switch to an Apple native watch face |
For more Apple Watch issues related to battery and power loss, check out our guide on how to find a dead Apple Watch ,it covers everything from using Find My to protecting your data when the watch goes offline.
Frequently Asked Questions (FAQ)
Short, direct answers to the most common questions people ask when they want to change Apple Watch to military time.
Can i Use 12 Hour and 24 Hour Time Simultaneously?
No. Apple Watch uses one time format for the entire system. You cannot show 12 hour time on one complication and 24 hour time on another at the same time. Whichever format you choose in the Watch app applies everywhere: the main clock, complications, notifications, and calendars.
Does This Affect Alarms and Timers?
Yes , but only how they are displayed, not when they fire. If you set an alarm for 9:00 PM before you change Apple Watch to military time, the alarm will still ring at the correct time. After the change, the same alarm will be listed as 21:00 on screen. The trigger time does not change, only the label.
Is “Military Time” the Same as “24 Hour Time”?
Yes, with one small difference. 24 hour time shows hours and minutes like 14:30. Military time uses the same numbers but without the colon: 1430 hours. Apple Watch uses the 24 hour format with a colon. So when you change Apple Watch to military time, you get 14:30 , not 1430. The two terms are used interchangeably in everyday conversation.
Does Changing to Military Time Affect Siri on Apple Watch?
Yes. Once you change Apple Watch to military time, Siri also reads and confirms times in 24 hour format. “You can verify the change by asking Siri, ‘What time is it?’” and Siri will respond with the 24 hour reading.
Final Thoughts
Learning how to change Apple Watch to military time is one of the fastest customizations you can make, and the impact shows up every time you glance at your wrist. Flip the toggle, wait a minute for sync, confirm on a native Apple watch face, and you are done.
If a third party face does not update, switch to a built in face. If the toggle is greyed out, turn off Set Automatically under iPhone Date & Time first. And if you ever lose your watch after the battery dies, our guide on how to find a dead Apple Watch walks you through the full recovery process step by step.
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