Over at Baseball Prospectus, Larry Granillo has figured out
the date of the Cubs-Braves game that’s featured in Ferris Bueller’s Day Off: June 5, 1985. And the follow-up from Al Yellon at SB Nation: through the magic of film editing, Matthew Broderick, Mia Sara, and Alan Ruck weren’t actually in the stands that day; they and some extras were there on an off day, probably in September or early October 1985. (Which would have been my guess anyway. My college degree is in That Sort of Thing. And I knew that the “Danke Schoen”/”Twist and Shout” scene was filmed at the actual Chicago Von Steuben Day parade in September 1985.) As noted, Ferris Bueller catches a foul ball in the actual movie, but Principal Rooney isn’t looking at the TV at the crucial moment. In
the MAD satire (“Fearless Buller’s Day Off”), Rooney later tells his secretary Grace that he knows Ferris is at the Cubs game
because “they announced his name when he came in to pinch hit.” This paragraph was written from memory.