If DPC wasn't watching MTV between 1992 and 1998 then he'll have little awareness of Spring Break. Us non-Americans are aware of 4th July and Thanksgiving because of tv but that doesn't mean we give a fuck.
He's making a college game because he was influenced by college movies, 99% sure he knows Spring Break.
Has nothing to do with him being American or not, I'm not American.
He's already brought up Spring Break in previous episodes as well, so change that 99 to 100.
mc: "You never did anything like Hell Week, right?"
Jill: "No, I've been spared from that."
Jill: "I mean, I do go to some of the Alpha Nu Omega parties, but I don't participate in the actual hazing."
Jill: "...or Spring break! I don't do Spring break."
mc: "Why? What do they do on Spring break?"
Jill: "Basically, what everyone else does. Move to the beach for a week and have outdoor parties."
mc: "I would say that it sounds fun, but I've seen what they do for Hell Week..."
mc: "...so I'm sure they found a way to make Spring break suck."
Jill: "Haha, Fuckface... It's natural to enjoy different things. You're not like them."
There's gotta be a spring break! That or a hot springs episodes, aptly named, "HOTs Springs".