Constitution Day is observed in North Korea on December 27 every year, commemorating the adoption of the Constitution of the Democratic People's Republic of Korea (DPRK) in 1972. The first constitution was adopted in 1948, modeled after the Soviet Union's 1936 constitution, with Joseph Stalin's involvement in its development. The 1972 Constitution established North Korea as a socialist state and marked Kim Il-sung as the President and supreme commander of the armed forces. This constitution has undergone several revisions, with the latest amendment in 2012 declaring the DPRK a nuclear-armed state. Celebrations on Constitution Day include public speeches, official ceremonies, flag hoisting, and large parades, where citizens honor the leaders Kim Il-sung, Kim Jong-il, and Kim Jong-un.