Thanks for posting this question in the global Canvas Community!
You can disable and enable calendars that are being viewed at a time. To do this you would click on the calendar button in the global navigation, to the left. This will bring up your global calendar and you can choose which course calendars are being viewed at a time. They will be color coded, and you can click the box next to each calendar to enable or disable. There will be an area to the right of the page that says "Calendars" and you can configure which ones are being displayed at a time.
I'm not sure if you are asking this question as an Instructor, Student or Observer. I will provide some helpful guides for each role.