When you create an assignment, ensure you are setting the Due Date based on the date you expect the receive the submission, whether students are turning in the assignment in-class or online.
Remind your students that the:
- Due Date translates to the date you are expecting a submission. (This is the date that they will pay attention to based on the Calendar Month or Agenda view in Canvas.)
- Post Date translates to the date you assigned the homework (most students will never notice or pay attention to this.)
Watch When creating an assignment, how shall I set the due date in Canvas:
Based on the Canvas Guides: How do I assign an Assignment to an individual student or course section?