Your Calendar tab allows you to save certain calendar views in the same way as your normal lists. You are able to apply filters to your calendar and then save those views so that you can return to them at a later date. To save a calendar view, simply apply filters to the Users or Filters tabs. The Users dropdown allows you to view only to-do items owned by those specific users and the Filters dropdown allows you to filter for specific task & event types. Once filters have been applied to your calendar the "Save Calendar" icon will appear in blue and you have the option to save this as a new calendar view.
You can review all of your saved Calendars by clicking on the Calendar View dropdown.
Note: The ability to star calendar views is not currently supported.