MATLAB licensing is on the fiscal year schedule (July 1 - June 30), so licenses expire on June 30 every year.
(There is a 30-day grace period during renewal, so licenses can be used through July 31.)
Once the Mathworks license is renewed, current faculty, staff and students will want to activate MATLAB again for that updated maintenance period to take affect. The easiest way to accomplish this is to run the activation client that gets installed with MATLAB. You do NOT need to re-install. You may obtain an updated activation key by clicking on the appropriate License Number and Key link on the folloring page.
Please note that MIT's license with the Mathworks requires that student uninstall MATLAB once they lose their student status at MIT (withdraw, graduate, become staff, etc).
Athena MATLAB licenses do not expire. The license keys are stored on the server and are renewed annually by IS&T. No user intervention is required.