Here are some steps for troubleshooting event not showing in the correct dates on Microsoft calendar:

1. Make sure that the Outlook client is synced with the Microsoft calendar.
2. Ensure that you inputted the date and time correctly in the calendar.
3. Check if the time zone is inputted properly.
4. Reconfirm the start and end date of the events.
5. Clear cached data for the app.
6. Restart the app and try again.