September 23 is the 266th day of the year.
- 1692, Friday: Marty McFly brings a spare flux capacitor to Salem, Massachusetts to help Doc Brown repair the Jules Verne Train.
- 1889, Monday: The playing card company, Nintendo (future video game company and developers of Wild Gunman) is founded in Japan.
- 1920, Thursday: Mickey Rooney (star of The Atomic Kid) is born in Brooklyn, New York.
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