Expiration of accreditation of the program
For you, who hold the degree: nothing. Your degree does not have an expiration date. It will remain valid for all uses after Jan 10, 2016.
For the department: if they want to continue enrolling students in this program and handing out this degree, they will have to renew their accreditation. This means justifying to a local or national regulating body (depending on the country and local law) the value of the degree, the seriousness of the degree-granting process, and many other such assurances.