It should be adjustable, 5 days is awful for my playstyle. I have my seasons set to 28 days so I can have proper holidays like xmas break for my kids and teens lasts a week and summer break I do for a few sim weeks. I was hoping I could kind of adjust the semesters more, it's very restrictive. I did see in the live stream when they were signing up for classes that it took 12 classes to finish the degree so I guess I could just take 1 or 2 classes a semester to make it take longer. I would have liked something like the seasons adjusting though. They didn't touch on that very much though so who knows it could just be a feature they overlooked.