Constitution Day in Poland commemorates the adoption of the Polish Constitution of 1791, the first modern constitution in Europe and the second in the world after the United States. It symbolizes Poland's commitment to freedom, democracy, and national unity. Today, it is one of Poland's most important national holidays, marked by patriotic parades, concerts and ceremonies across the country.

Constitution Day commemorates the enforcement of Japan’s postwar Constitution of 1947, which established democracy, pacifism and the sovereignty of the people. The day encourages citizens to reflect on the meaning of democracy and peace in modern Japan. It is also part of Golden Week, a series of national holidays when museums, government buildings and cultural sites often hold special events and open houses.