It wouldn't be #NationalHamburgerDay without the funniest hamburger-related joke in the history of The Simpsons. Yes, the hilarious "Steamed Hams" segment from the 1996 episode "22 Short Films About Springfield." It takes a look at the other residents of the town outside of the Simpsons family. What's unique is that a majority of the shorts about the townspeople are all connected in some way.
The relationship between Principal Skinner and Superintendent Chalmers has always been a contentious one. Skinner is a bumbling dope trying to run his school and Chalmers is the strict authoritarian who is not amused by anything. Skinner invites Chalmers over for dinner, and as they say... hilarity ensues. And it involves hamburgers, hence the mention on #NationalHamburgerDay.