By default, Canvas courses are active for a few weeks after a term ends. For a list of term end-dates in Canvas, please consult: 

Terms in Canvas

When a Canvas site is active, users can perform actions in the site (for example: post to a discussion).

Once a term ends, a Canvas site enters a read-only state. When this happens, site is visible a user enters Canvas, clicks Courses, and scrolls down to past enrollments.

Please note: