In his debut, the character was presented as a joke villain, but in later years, writers developed Calendar Man as a dark, disturbed criminal who toys with Batman.

[2] The character made his live-action debut as a cameo in the DC Extended Universe film The Suicide Squad (2021), portrayed by Sean Gunn.

In this instance, the Calendar Man's theme is holidays, and he attempts to use the young Jason Todd, as Robin, as the Batman's Achilles' heel, with the promise of his demise on the first day of Spring.

[7][8] Like Lecter in the novels of Thomas Harris, Calendar Man knows who the killer is and keeps this information to himself, choosing instead to taunt the heroes with cryptic clues.

He returns in that story's sequel, Batman: Dark Victory, in which he impersonates deceased mobster Carmine Falcone in an effort to drive his children, Alberto and Mario, insane.

Calendar Man teams up with Catman and Killer Moth as part of The Misfits, a group of villains trying to prove themselves in Batman: Shadow of the Bat #7–9 (1992–1993).

[4] Also, he is among the Arkham Asylum inmates freed by Bane in Batman: Knightfall, but he is easily recaptured by Power Girl shortly after his escape.

In Team Titans #14 (Nov 1993) Calendar Man and several other villains whose crimes center on time-based motifs, including Time Commander, fight the title's heroes over a valued hourglass.

[9] Calendar Man appears in "All the Deadly Days", a story in 80 Page Giant Batman Special Edition #3 (July 2000), in which he has acquired a new high-tech costume, and moves up to more grandiose crimes.

Julian, meanwhile, finally decides he should pay his child some attention and plans to get a calendar, but Batman forces him into a bathroom and punches him into some tiles.

In his latest incarnation, as written by Scott Snyder and Tom King in the pages of the Batman Rebirth special (June 2016), the Calendar Man now ages with the seasonal weather of Gotham City.