They mention that this episode takes place "January 6, 1980-something" but the Beastie Boys album they are listening to and lip syncing to is Paul's Boutique which came out in JULY of 1989, so there is no way they could be listening to this during the 1980's on "January 6th"
Takes place in January 1980-something (in Pennsylvania), but all trees and bushes are fully green and members of the JTP are sitting outside at school wearing lite clothing/t-shirts.
When The Tasty Boys enter the school, they push the doors in to enter. The doors are set up to open out with the push-open bar on the inside, and the handle on the outside.