September 1 is the 244th day of the year.
- 1885, Tuesday: Doc Brown writes the letter to Marty McFly, and hands it to Western Union to hold until 1955.
- 1897, Wednesday:
- Marty, Jules and Verne Brown traveled back here from 1991. They planned to prevent Pee Wee McFly from losing the game on the next day that prevented the Boston Beaneaters from winning the 1897 National League Pennant Race. Marty briefly filled in for his ancestor and won the game, much to the latter's dread.
- Later that night, Marty told Pee Wee "Get out of town", which he took literally and prepared to do so. Marty had to fill in for him the next day.