Calendar Man is an enemy of Batman obsessed with dates, who commits crimes according to the calendar based on significant holidays. Originally depicted as wearing a series of garish costumes depending on the date, he developed into a more serious look during The Long Halloween with a tattoo of the months surrounding his skull. Diagnosed as clinically insane, he is a resident of Arkham Asylum. He has been a member of the Misfits and the Time Foes. Calendar Man was created by Bill Finger and Sheldon Moldoff, first appearing in Detective Comics #259. (1958)

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