Here are the steps you could take to troubleshoot this issue:

1. Verify that the event is correctly listed on your calendar and that the settings indicate that the calendar is visible for other people.


2. Check that the application you are using to search for the event is properly synched with the correct calendar.


3. Check also that you are using the correct login account for the calendar.


4. Check the security/privacy settings for the calendar.


5. Delete and re-add the calendar to verify that there are no duplicates.