Limiting access to self-paced courses

[GautamJ0406]

Hello,

My institution is considering offering self-paced courses which will let students access the course material for 3 months after they sign up.

The problem is not solved by using course Start and End dates, as each student will sign up at a different date. For example, a student who signs up on the 5th of January would have access only until the 5th of April, while a student in the same course who signs up on the 20th of January would have access until the 20th of April.

Any suggestions on how to achieve this?

Pre-emptive thanks to all who can help!