National Wicked Day is observed in the United States every October 30, celebrating the renowned Broadway musical "Wicked." This holiday was established in 2023 by representatives from Wicked The Musical in collaboration with National Day Calendar. It honors the musical, which features music and lyrics by Stephen Schwartz and a book by Winnie Holzman, inspired by Gregory Maguire's novel that explores the backstory of Elphaba, the Wicked Witch of the West. To celebrate, theatre lovers can attend a local or touring production, listen to the original Broadway cast recording, or engage in activities such as cosplaying as characters from the show. The original Broadway production premiered on October 30, 2003, and has since become a cultural phenomenon, winning multiple awards and spawning international productions.