NEW YORK -- Saturday marked the annual global celebration of the caped crusader - it's Batman Day!
The Bat Signal lit up the night in cities around the world, including New York City.
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The signal projection was broadcast on the side of the Domino Sugar Refinery in Brooklyn.
Batman writers were there to hold a signing and panel discussion.
The spire of the Empire State Building was also lit up in Batman yellow and white.
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Batman Day is celebrated each year on the third Saturday of September, and this year marks the Dark Knight's 80th anniversary.