Why is my Microsoft calendar not showing all events from a specific category?

1. Check if the category you are trying to view in calendar has any events.
2. Go to settings of calendar and check if you have turned on the category.
3. Make sure that the events are added to the correct calendar.
4. Update the calendar app to the latest version.
5. Restart your device to make sure that calendar is not running in the background.
6. Sync the calendar with your computer to make sure that all events are added.
7. Clear the app data to reset the app.