11. *Constitution Day. The 10th of December is marked as Constitution Day. It was on this day in 1932 that King Rama VII bestowed the first Constitution of the Kingdom of Siam, the permanent version, to the Thai people. This was after the system of government had been changed from that of absolute monarchy to that of democracy with the King as head of state and a constitution as its supreme law. Up to the year 2007, Thailand had adopted 17 constitutions.