Mickey Mouse’s birthday is officially celebrated on November 18 , marking his debut in the cartoon Steamboat Willie on November 18, 1928.

Quick Scoop: Date & Origin

  • Disney recognizes November 18, 1928 as Mickey Mouse’s official birthday, tied to the premiere of Steamboat Willie in New York.
  • Earlier studio history used a few different dates, but November 18 eventually became the fixed “birth date” fans and Disney celebrate worldwide.

Why That Date Matters

  • Steamboat Willie was one of the first cartoons with synchronized sound, and its success turned Mickey into Disney’s breakout star.
  • Because that screening launched Mickey into popular culture, the debut date, not the first drawing or production start, became his official birthday.

Fun Timeline Bits

  • Mickey’s character development started earlier in 1927–1928, evolving from ideas around a rabbit character named Oswald before Disney lost the rights and created a new mouse.
  • For years, various birthdays were mentioned (like an October 1 date linked to when work began on his first cartoon), but Disney’s historical materials now consistently highlight November 18.

TL;DR: When someone asks “when is Mickey Mouse’s birthday,” the answer most fans and Disney use is November 18, 1928.

Information gathered from public forums or data available on the internet and portrayed here.