Gorilla Suit Day is celebrated on January 31 each year, primarily in the United States. This quirky holiday encourages participants to don gorilla suits, often associated with Halloween, costume parties, and various fun events. The day is a lighthearted homage to the gorilla suits that have appeared in movies and popular culture, allowing people to embrace their inner primate. The tradition has roots in the early 20th century, with the first realistic gorilla suit created by Hollywood make-up artist Carlos Cruz Gemora. Although special effects have largely replaced the need for such costumes in films, some enthusiasts continue to celebrate the gorilla suit legacy. Fans of "MAD" magazine also commemorate the day, inspired by a comic that humorously depicted a fictitious Gorilla Suit holiday. Overall, Gorilla Suit Day invites people to engage in playful celebrations while honoring the unique history of gorilla suits.