To view calendar report you will need to have the correct permission, here you will be able to see all the task within the calendar month, completed tasks, upcoming and overdue:
You can use the different tabs, to view only the tasks you wish to see just by clicking on the ones you would like hidden from the report:
You can view each event by clicking on the event its self to view the desciption, tasks left to do, etc...
Within each event box on the report page if there are tasks you will see this symbol
If you click on this task symbol, it will mark all task as completed and move it to completed tasks.
