National Twilight Zone Day is observed in the USA every year on May 11. This holiday celebrates the iconic television show The Twilight Zone, which originally aired from 1956 to 1964, featuring a mix of fantasy, drama, psychological fiction, science fiction, suspense, and horror across 156 black-and-white episodes. The series premiered on CBS on October 2, 1959, and has since become one of the most popular science fiction series in the world. The show was revived in 1985 with 110 color episodes and again in 2002 with 44 episodes. Although the origins of National Twilight Zone Day and the reason for selecting May 11 as the date are unclear, fans typically commemorate the day by watching their favorite episodes or engaging with related activities, such as playing The Twilight Zone board game.