You can filter display in Calendar

A filter is an easy way to view only those items
assigned to Item Types you specify. For example, you can filter all Birthdays
and Anniversaries to see only items of these item types. All of the other items
can be seen again by removing the filter.

For tasks, there is one filter for grid, while
for calendar, there are two filters. One is for grid, and the other is for
scheduler. When switch to Day/Week/Month/Year view, you can use the
filter of scheduler. In the scheduler of calendar, you can
specify:

• Display all events: Displays all events in
  Calendar.


• Display not private events: Does not display
  private events in Calendar.


• Display private events: Only displays private
  events in Calendar.