Constitution Day in Thailand is celebrated on December 10 to commemorate the adoption of the country's 1st permanent constitution, proclaimed on December 10, 1932. Although the Constitution was subsequently revised several times, the Constitution of 1932 became the main law of the country and was a significant progress compared to the previously adopted provisional Charters.
The People's Party, officially registered in August 1932, proclaimed a permanent Constitution on December 10, 1932, according to which the monarchy received increased powers and power compared to the provisional Statutes.
The new Constitution consolidated the provision that the supreme (sovereign) power now belongs to the citizens of Siam. However, according to the Constitution, the monarchy will be the direct apparatus of this power.