November 1, 1956: Birth of Kerala.
March 1957: First Assembly Election
April 5, 1957: EMS Ministry [First Communist Party to Elected to power by ballot]
July 31, 1959: EMS Ministry dismissed.
February 1960: Election to the assembly.
February 22, 1960: Pattom Thanu Pillai Congress ministry sworn in.
September 25, 1962: Pattom appointed Governor of Punjab.
September 26, 1962: Congress ministry under R Sankar Sworn in.
September 10,1964: Sankar ministry goes.
March 1965: Assembly Election (in-fructuous)
February 1967: Election to the Assembly.
March 6, 1967: Second Communist ministry under EMS Sworn in.
October 24,1969: EMS ministry goes.
November 1, 1969: Achutha Menon ministry sworn in[LDF].
June 26, 1970: Assembly dissolved.
August 1,1970: Achutha Menon ministry resigns.
September 1970: Assembly Election.
October 4,1970:Second time Achutha Menon ministry sworn in [LDF].
March 1977: Election to the Assembly.
March 25 1977: Karunakaran ministry sworn in.
April 25 1977: Karunakaran resign.
April 27,1977: A.K Antony Sworn in as chief minister.
October 27,1978: A.K Antony resigns.
October 29,1978: P.K Vasudevan nair ministry sworn in. [LDF].
October 7, 1979: P.K Vasudevan nair ministry resign.
October 11, 1979:C.M Mohammed koya ministry sworn in.
December 1, 1979: Mohammed goes resign.
January 1980: Election to the Assembly.
January 25,1980: E K Nayanar ministry sworn in.
October 20, 1981: E K Nayanar ministry goes out.
December 28,1981: Karunakaran ministry sworn in.
March 17, 1982: Karunakaran ministry resign.
May 19, 1982: Assembly Election.
May 24, 1982: Karunakaran ministry sworn in.
March 23,1987: Assembly Election.
March 25,1987: E K Nayanar ministry sworn in.
June 24,1991: UDF under Karunakaran was voted back.
March 16,1995: Karunakaran was forced to resign.
March 22, 1995: A.K Antony became the chief minister for the remaining term.
May 20,1996: E K Nayanar ministry sworn in.
May 13,2001: E K Nayanar ministry completed five year in power.
August 31,2001: A.K Antony became the chief minister.
August 29,2004: A.K Antony resigned.
August 29,2004: Ommenchandy was sworn as Chief Minister for remaining term.
May 2006: V.S Achuthananadan became Chief Minister.