Oct. 13, 1925: Born at Grantham, central England.
June 1947: Graduates from Oxford with a chemistry degree.
Dec. 13, 1951: Marries Denis Thatcher, a wealthy oil executive.
Aug. 15, 1953: Gives birth to twins, Mark and Carol.
June 1, 1954: Qualifies as a lawyer.
Oct. 8, 1959: Elected to Parliament.
June 20, 1970: Becomes education secretary.
Feb. 11, 1975: Elected leader of the Conservative Party.
May 3, 1979: Wins national elections, becomes prime minister.
June 9, 1983: Wins second term.
June 11, 1987: Wins third term.
Jan. 3, 1988: Becomes Britain's longest continuously serving prime minister of 20th century.
Nov. 22, 1990: Announces resignation after party revolt.
Nov. 28, 1990: John Major succeeds her as prime minister.
June 26, 1992: Becomes Baroness Thatcher of Kesteven, a member of the unelected House of Lords with a lifetime title.
March 22, 2002: Ends public speaking after suffering a series of small strokes.
June 26, 2003: Her husband, Sir Denis Thatcher, dies.
April 8, 2013: Dies of stroke.
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