September 15

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September 15 is the 258th day of the year.


  • 1885, Tuesday (Doc's altered timeline):
  • 1967, Friday: The Star Trek episode "Amok Time" premiered. The episode introduced the Planet Vulcan and the Vulcan Salute, both of which Marty implemented in his Darth Vader disguise.

Behind the scenes

The aforementioned event was postulated by Bob Gale and Robert Zemeckis in their official FAQ. If Clara commits suicide in the ravine, it is renamed Clayton Ravine and the space-time continuum is restored to its previous self, the timeline before Doc ever arrived in 1885.



  1. Back to the Future: The Animated Series actually suggested the wedding to have occurred in December 15 of the same year in the episode "Solar Sailors, but this date was recently established in Back to the Future: The Card Game.

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