Maurice Harold Macmillan , 1st Earl of Stockton , -LRB- 10 February 1894 -- 29 December 1986 -RRB- was a British Conservative politician and statesman who served as the Prime Minister of the United Kingdom from 10 January 1957 to 19 October 1963 .
Harold Macmillan died on December 29 , 1986 .