Tom reads a news article about how securities were stolen as employees watched a Series game won by the Mets on TV. This gives him the idea to do the heist during the parade for the Apollo 11 astronauts. The Mets didn't appear in the World Series until October 1969. However, Cliff and Joe rob the brokerage house during the parade for the Apollo 11 astronauts, which took place in the summer of 1969.
At the end of the film, when they crash the car into the Police storage yard, the car they crash into the lot is not the same car they were driving through Central Park. The car in Central Park is a 1972 Plymouth Fury, while the one that crashes into the police storage yard is clearly a 1968 Plymouth Fury.