Invite an Alien to Live with You Day is celebrated every July 21 in the United States, inspired by the sitcom "Mork & Mindy." This quirky holiday encourages individuals to contemplate life beyond Earth and imagine the humorous scenarios of hosting an extraterrestrial. Participants often engage in activities such as watching episodes of "Mork & Mindy" or other alien-themed movies, and sharing creative content on social media platforms. The day also sees brands embracing the theme with promotions on sci-fi movies, alien-themed merchandise, and special menu items, particularly from fast-food chains like Taco Bell. The holiday highlights the comedic character Mork, portrayed by Robin Williams, who famously attempted to understand human customs.