NATIONWIDE — The Bat Signal shined bright in major cities across the world Saturday night to commemorate 80 years of Batman.

  • "Batman Day" celebrated across the globe September 21
  • Bat-Signal shined on buildings in NYC, London, Tokyo, and more

September 21 was deemed "Batman Day" for the Caped Crusader, whose first comic came out in 1939.

To celebrate, the Bat-Signal was displayed on the Domino Sugar Refinery in Brooklyn, New York. Other cities around the world also joined in the celebration of the Dark Knight's birthday, including Berlin, London, Melbourne, Rome, and Tokyo.

Here are some bat-facts:

  • Bruce Wayne got his name from two real-life historical heroes: Robert the Bruce and Mad Anthony Wayne of the American Revolution.

  • The Batcave first debuted in a 1943 serial (movie).

  • Before his no-kill policy, Batman used to kill his enemies.

  • How did Gotham City get its name? Batman writer and co-creator Bill Finger picked "Gotham" from opening up a phone book and randomly putting his finger on a person's name.

  • Batman's creation was inspired by Zorro, Bela Lugosi's Count Dracula, and The Shadow.

  • Bruce Wayne is worth $9.2 billion, according to a Money.com estimate.