3 Events from Sept 23:
- 1846 - Discovery of Neptune by French astronomer Urbain Jean Joseph Le Verrier and British astronomer John Couch Adams; verified by German astronomer Johann Gottfried Galle.
- 1889 - Nintendo Koppai (Later Nintendo Company, Limited) founded by Fusajiro Yamauchi to produce and market the playing card game Hanafuda.
- 1980 - Bob Marley's last concert.
- 1215 - Kublai Khan of the Mongol Empire (d. 1294)
- 1949 - Bruce Springsteen, American singer and songwriter