Originally Kigensetsu. In 1872 (Meiji 5), the Meiji Government acknowledge February 11th, 660 BC, as the coronation day of the first Emperor Jinmu, a legendary emperor. This holiday was one of the four major holidays in Japan. People were expected to show their patriotism by raising the Japanese flag at their gates, singing patriotic songs, etc.After World War II, Japan abolished the Shinto calendar along with Kigensetsu. In 1966, this holiday was reinstalled as “Kenkoku-Kinen-bi“( literally, “commemoration of the founding of the nation”). Although it is no longer tied to the Imperial Family, you may see more Japanese flags than usual.
Starting from this a small set of postcard: