How to Fix Calendar Not Working in Windows 11

The Calendar app in Windows 11 is used to manage schedules, view events, and sync appointments from Microsoft, Google, and other supported accounts. When the Calendar app stops working, common issues include the app not opening, events not syncing, blank screens, crashes, or notifications not appearing as expected.

Calendar issues in Windows 11 are usually caused by corrupted app data, sync problems with the connected account, outdated system components, or conflicts introduced after Windows updates. In most cases, the problem is software-related and does not indicate an issue with your account or stored events.

Fixing Calendar not working in Windows 11 involves repairing or resetting the app, checking account sync settings, and ensuring Windows services and updates are functioning properly. The steps below explain how to restore normal Calendar functionality.

How to Fix Calendar Not Working in Windows 11

The methods in this section focus on resolving app corruption, sync failures, and system-level issues that commonly prevent the Calendar app from working correctly. Apply the steps in order and test the Calendar app after each method.

Restart the system where instructed so changes take effect properly.

1. Restart the Calendar App and Windows Explorer

Temporary glitches can cause the app to freeze or fail.

1. Close the Calendar app completely.
2. Press Ctrl + Shift + Esc to open Task Manager.
3. Restart Windows Explorer.
4. Reopen the Calendar app.

This refreshes the app environment and UI components.

2. Check Internet Connection and Sync Status

Calendar relies on an active internet connection.

1. Ensure your device is connected to the internet.
2. Open the Calendar app.
3. Check for sync error messages.
4. Click Sync if available.

Sync failures can prevent events from loading.

3. Check Account Sync Settings

Incorrect sync settings can stop Calendar updates.

1. Open Settings.
2. Go to Accounts.
3. Select Email & accounts.
4. Choose the account linked to Calendar.
5. Click Manage.
6. Ensure calendar sync is enabled.

Disabling calendar sync prevents events from appearing.

4. Repair the Calendar App

Repairing fixes corrupted app components.

1. Open Settings.
2. Go to Apps > Installed apps.
3. Locate Calendar.
4. Click the three-dot menu and select Advanced options.
5. Click Repair.
6. Wait for the process to complete.
7. Open the Calendar app again.

This does not delete your calendar data.

5. Reset the Calendar App

Resetting clears corrupted app data.

1. Open Settings.
2. Go to Apps > Installed apps.
3. Select Calendar.
4. Open Advanced options.
5. Click Reset.
6. Confirm the action.
7. Restart the system.

You may need to sign in again after reset.

6. Re-add Your Calendar Account

Account sync issues can cause Calendar failures.

1. Open Settings.
2. Go to Accounts > Email & accounts.
3. Select the affected account.
4. Click Remove.
5. Restart the computer.
6. Add the account again.
7. Open Calendar and allow it to sync.

This rebuilds account and calendar connections.

7. Update Calendar and Mail App

Outdated app versions can cause bugs.

1. Open Microsoft Store.
2. Go to Library.
3. Update Mail and Calendar apps.
4. Restart the system after updates.

App updates often fix known issues.

8. Update Windows 11

System updates improve app compatibility.

1. Open Settings.
2. Go to Windows Update.
3. Click Check for updates.
4. Install all available updates.
5. Restart the computer.

Calendar issues are often resolved through updates.

9. Check Date and Time Settings

Incorrect system time can break calendar sync.

1. Open Settings.
2. Go to Time & language.
3. Select Date & time.
4. Enable Set time automatically.
5. Enable Set time zone automatically.
6. Restart the Calendar app.

Incorrect time settings prevent event syncing.

10. Run System File Checker

System file corruption can affect built-in apps.

1. Open Terminal (Admin).
2. Run the following command:
   sfc /scannow
3. Wait for the scan to complete.
4. Restart the system.

This repairs corrupted Windows components.

Final Thoughts

Calendar not working in Windows 11 is usually caused by app corruption, account sync issues, or outdated system components rather than data loss. In most cases, repairing or resetting the app and re-syncing the account restores full functionality.