Keep homework assignments from previous years accessible

I'm going to try and keep this brief and structured for easy reading.

Current system: homework assignments open up in the week they are given, and when the year finishes, everything closes again, including previous years. For example, a fourth-year student can do homework in courses from year 1-4, but if it's week 1, they can't access year 3 week 10, despite having been able to access it before.

Suggestion: keep the already accessed homework assignments open. This way assignments in later weeks can be done even if you don't have the time around week 10, you can just do it anytime outside of exam week. It also makes rereading your homework assignments possible if you've handed them in but it's not yet the relevant week.