On this day in 1931, the Mickey Mouse cartoon ‘The Birthday Party’ was released. Minnie hosts a surprise party for Mickey with all of the early Disney characters attending, including Horace Horsecollar and Clarabelle Cow. Mickey is gifted a miniature piano, and the group celebrates with music and dancing. Mickey’s official birthday was not established in the early years, so celebration dates ranged widely. It was finally defined as November 18, 1928, in the early 1970s. [95 years ago in 2026]