October 16
From The Met Wiki
1969: The Mets defeat the Orioles, 5-3, in Game 5 of the World Series at Shea Stadium to clinch the World Championship.
1973: Mets lose Game 3 of the World Series to the Athletics, 3-2, in 11 innings at Shea Stadium.
2000: The Mets beat the Cardinals, 7-0, in Game 5 of the National League Championship Series at Shea Stadium to clinch the pennant.
