Educators using GitHub Classroom can now optionally set a assignment deadline to be a "hard cutoff." If you use a cutoff date, students will lose write access to their assignment repositories after the cutoff date has passed.

You can grant individual students and groups extensions to allow them more time to submit an assignment.

The assignment dashboard view is now updated to better indicate whether a student has committed to their repository on-time (before the deadline), late (after the deadline), or both. You can easily filter the dashboard view on these states, and quickly click through to the latest on-time and late commits of a student's repository.

Addressing a big ask from students, they can now click a button in their assignment README to view the deadline of the assignment at any time.

Read more about creating a new assignment, extending a deadline, and students' ability to view their assignment's deadline.