You can manually mark a calendar meeting as complete.
1. Click on 'calendar' in the top menu bar.
2. It looks like Fitzgerald is supposed to have a reading conferring session today. We click on his name to view the edit/more information window.
3. From this edit window, check the empty box next to 'Completed' and click 'Save'.
4. Now, you can see Fitzgerald's calendar meeting has been marked as complete.