passbook notifications not showing the right time

Hello there, Nacif.

It sounds like you are experiencing issues with Date and Time with particular Notifications from your Passbook app. The following Knowledge Base article delves into troubleshooting issues with Date and Time on your iOS device:

iOS: Troubleshooting issues with date and time - Apple Support

Follow these steps. Test after each step to see if the issue is resolved.

1. Ensure that the version of iOS on your device is up to date.
2. If the option to enable date and time automatically is available, turn it on. Tap Settings > General > Date & Time.
3. Ensure that your time zone is set up correctly. Tap Settings > General > Date & Time > Time Zone.

If the incorrect date, time, or time zone is being set up automatically on the device, please notify your cellular provider. In the meantime, tap General > Date & Time and turn off Set Automatically. Then set the appropriate time and time zone manually.

Note: The option to set automatically might not be available on all carriers in all countries.

Learn more

Note: If you find that your device's time is incorrect after you sync with your computer, your computer's time may be incorrect. Verify the computer's time in System Preferences > Date & Time (you may want to select the checkbox to set the computer's date and time automatically).

Additionally, many Notifications, particularly for apps installed on your device are reliant of the settings within the App itself. This article will provide some great guidance in regard to apps installed on your device:

If an app you installed unexpectedly quits, stops responding, or won’t open - Apple Support

Restart the app

Close the app and open it again.

Restart your device

Turn your device off and back on.

Check for iOS and app updates

1. Make sure that you're using latest version of iOS.
2. Open the App Store and tap Updates.
3. If updates are available, tap Update All.
4. If asked, enter your Apple ID password.

You might need a Wi-Fi connection to update some apps.

Install another app from the App Store

Try installing a different app that you don't have on your device. Find a free app from the App Store, and remember to use the same Apple ID that you used to download the app that you're having issues with.

Delete and reinstall the app

1. Tap and hold the app until it jiggles.
2. Tap the on the app.
   
3. Press the Home button.
4. Go to the App Store and download the app again.
5. Wait for the app to download, then open it from the Home screen.

Contact the app developer

If you see this issue again, contact the app developer for help:

1. Find the app in the App Store.
2. Tap the app, then tap Reviews.
3. Underneath App Store Customer Reviews, tap App Support.
   

Thanks for being a part of Apple Support Communities.

Kind Regards.