If you are facing the Outlook Calendar Not Showing Meetings issue, then try these. Firstly, you have to check the meeting organizer. If you are a meeting organizer then you need to change your meeting time, and the date and also change your meeting subject. 

As an alternative, you need to create a new meeting request. On the other hand, verify the meeting time and date if you are a meeting organizer. If the meeting time and date are not correct then you need to change it and also change your meeting subject.