Hi Karim,
Unfortunately, we cannot extend the submission deadline for the final assessment. However, the course materials for Digital Analytics Fundamentals will remain available even after the deadline for earning the certificate of completion passes, so you can still begin and complete the course at your convenience.
We do plan to offer the course again in the future, but don't have specific dates to announce yet. You can follow the Google Analytics blog or the Analytics Academy Google+ page for announcements about new course offerings in the coming months.
Cheers,
Christina from the Analytics Academy Course Staff