Canvas - timed release assignments
If you want to set up an exam or other time limited assignment in Canvas, this can be achieved by setting the appropriate day of the assessment then adding in the start and end time of the assessment for the same day. The assessment would not be visible to the students until the time of release, you would just direct them to the course page for review at the set time. This is a short video of how to do this - click here - where I talk through the process with one of the lecturers.