It's pretty reasonable to believe that just about every day in comic shops around the United States, it's unofficially Batman Day. But in celebration of the character's 75th anniversary, DC Comics has made July 23 the official day to commemorate the many incarnations of the Caped Crusader.

Participating comic shops will be handing out free, special-edition reprints of Detective Comics #27, which includes a reimagining of Batman's origin written by Brad Meltzer. Even better, they'll have other Batman goodies including capes, bookmarks and masks designed by artist Ryan Sook. The masks include 1930s Batman, Batman from the 1966 TV show, Dark Knight Returns Batman, and the current comics version of the hero.

Fans will also have the chance to pick up digital versions of the special Detective Comics #27 issue digitally on July 23.

Three days later, on July 26, DC will partner with Random House to bring Batman Day to libraries all over the United States.