National Horror Movie Day is observed worldwide on October 23, celebrating the horror film genre and coinciding with the birthday of American director Sam Raimi, known for the Evil Dead franchise. Launched in 2023 by Black Vortex Cinema in collaboration with National Day Calendar, the holiday encourages fans to share their love for horror movies. Celebrations typically include organizing horror movie marathons, hosting costume parties, attending local horror film festivals, and reading horror literature that has been adapted into films or TV shows. Participants are also encouraged to engage on social media using the hashtag #NationalHorrorMovieDay. The horror genre has evolved significantly since its early roots in Gothic fiction and has become a popular and adaptable form of entertainment, reflecting societal fears and anxieties throughout its history.