The only time the Eagles played the Cowboys in January in the 1980s was the NFC Championship on January 11, 1981. However, the game described on the show does not match the actual game, which the Eagles won 20-7. The Cowboys did not kick a field goal, and Mike Quick joined the Eagles in 1982.
Takes place January 7th 1980-something. However, all outdoor scenes show trees/shrubbery fully green and characters are dressed for warm weather and even have an outdoor party. Not possible in SE Pennsylvania where show is set.