On August 16, all fans of Batman comics celebrate Joker Day, one of the most charismatic and mysterious supervillains in the DC Comics universe. This character first appeared on the pages of publications in 1940. He was destined for a sad fate - to play a small role in the plot and disappear, but the Joker turned out to be a tough nut to crack. Today he is rightfully considered one of the most popular villains, with thousands of fans.