No, it's not possible to earn a certificate in a course session that has ended. To earn a certificate you will have to upgrade to the verified track by the course upgrade deadline, and reach a passing score before the course end date. After the course ends and becomes archived, progress scores no longer update.
Read more:
- When does my course start and end?
- How long do I have to finish? When does the course end?
- What does archived mean?