October 15 was the 288th day of the year (289th in leap years) in the Gregorian calendar.

Events

• 1931: The Hill Valley Science Expo ends.
• 1959: Biff Tannen's success from the day before is mentioned in the Hill Valley Telegraph.

Appearances

• Back to the Future: The Game
  • Back to the Future: The Game - Episode 2: Get Tannen! (Mentioned only)
  • Back to the Future: The Game - Episode 4: Double Visions (Mentioned only)