Constitution Memorial Day, also known simply as 'Kenpō Kinenbi', is a significant annual national holiday in Japan. It takes place each year on May 3rd and it's a part of the Golden Week, a collection of four national holidays within seven days. This day is purposed to commemorate the promulgation of the 1947 post-war constitution of the country.
This special day was first celebrated in 1948, a year after the ratification of the constitution. The formal enactment of the constitution signaled a shift from a form of government centered around imperial rule to a form of parliamentary democracy after World War II. As such, Constitution Memorial Day provides a chance for the Japanese public to reflect on democracy, the rule of law, and human rights - all of which are key elements in the 1947 constitution.
Across Japan, ceremonies are conducted in commemoration, with the centerpiece being the one organized by the Japanese government at the Tokyo Kōkyo. Additionally, some city governments and non-governmental organizations also host lectures and public discussions to enlighten citizens about the constitution. The National Diet Library holds an annual exhibition related to the constitution and its history. Although it's a solemn day, it is often celebrated with peaceful reflections on the democratic milestones Japan has achieved.