This television episode refers to:
December 17, 1982
It's game night at Christine's house, and Christine is trying to get her boyfriend Patrick to lose so everyone can see his rage issues. The group is playing the game "Celebrity" and it's Barb's turn to give a clue. The celebrity is Johnny Carson, but New Christine and Richard don't get Barb's clue of "Heeeeeeere's.... New Christine guesses "Tootsie" followed by, Bill Murray, followed by 'Groundhog Day'.