Japan's Constitution Memorial Day, celebrated annually on May 3, marks the enforcement of the Constitution of Japan in 1947. However, the date was not chosen for its historical significance but as the result of a compromise with the Allied occupation authorities.
Initially, November 3 was favored for the holiday because it was Emperor Meiji's birthday and a familiar date to the public. However, the General Headquarters (GHQ) opposed linking the Constitution to the Emperor. The compromise split the dates: November 3 became Culture Day, and May 3 became Constitution Memorial Day, with the six-month gap intended for public awareness.
This backstory reveals how a political negotiation shaped a national holiday, giving May 3—a date with no inherent meaning—its place in Japan's calendar.