Kim Il-sung (15 April 1912 – 8 July 1994) was a Korean politician who led North Korea from its founding in 1948 until his death. He held the posts of Prime Minister from 1948 to 1972 and President from 1972 to his death. He was also the General Secretary of the Workers' Party of Korea, exercising autocratic power. During his tenure as leader of North Korea, he favored his self-developed Juche idea. Following his death in 1994, he was succeeded by his son Kim Jong-il. Kim Il-sung is designated in the constitution as the country's "Eternal President". His birthday and the day of his death are public holidays in North Korea.