National day Day may be celebrated any day between 15 April and 15 May. Another example is Thailand which celebrates the birthday of the king on 28 July. This date will change on the accession of the heir to the throne. Most national days can be categorized in two large blocks: Denmark and the United Kingdom are among the few countries that do not have designated national days (though Constitution Day has many of the same features of a national day in Denmark's case). Importance attached to the national day as well as the degree to which it is celebrated vary greatly
National Foundation Day National Foundation Day The origin of National Foundation Day is New Year's Day in the traditional lunisolar calendar. On that day, the foundation of Japan by Emperor Jimmu was celebrated based on "Nihonshoki", which states that Emperor Jimmu ascended to the throne on the first day of the first month. In the Meiji period, the government of Meiji Japan designated the day as a national holiday because of the modernization of Japan by the Meiji Restoration. Under the "bakufu", people in Japan had worshiped the emperors as living gods, but regional loyalties were just as strong as national loyalties with