April 18 is the 106th day of the year.
Event
- 1906, Wednesday: San Francisco, California had an earthquake during which the Hill Valley victims of the quake made use of the Courthouse.
- 1938, Monday: The first issue of Action Comics (Known mostly for the introduction of Superman) is made available for purchase.
- Doc arrives on this date to to purchase several copies of the comic with the intent to sell a copy in the future at Southby's Auction House.
Real world
- 1973, Wednesday: Cavan Scott (Writer of the comic book miniseries The Transformers/Back to the Future) is born in Bristol, United Kingdom.
Appearances
- Back to the Future: The Game
- Back to the Future: The Game - Episode 3: Citizen Brown (Mentioned on the Self Tour speaker by the Courthouse.)
- Back to the Future: Untold Tales and Alternate Timelines 4