Science Fiction Grand Masters' Birthdays
1975Robert A. Heinlein(7 Jul 1907)
1976Jack Williamson(29 Apr 1908)
1977Clifford D. Simak(3 Aug 1904)
1979L. Sprague de Camp(27 Nov 1907)
1981Fritz Leiber(25 Dec 1910)
1984Andre Norton(17 Feb 1912)
1986Arthur C. Clarke(16 Dec 1917)
1987Isaac Asimov(2 Jan 1920)
1988Alfred Bestor(18 Dec 1913)
1989Ray Bradbury(22 Aug 1920)
1991Lester del Rey(2 Jun 1915)
1993Frederik Pohl(26 Nov 1919)
1995Damon Knight(19 Sep 1922)
1996A.E. van Vogt(26 Apr 1912)
1997Jack Vance(28 Aug 1925)
1998Poul Anderson(25 Nov 1926)
1999Hal Clement(30 May 1922)
2000Brian Aldiss(18 Aug 1925)
2001Philip José Farmer(26 Jan 1918)
2003Ursula K. Leguin(21 Oct 1929)
2004Robert Silverberg(15 Jan 1935)
2005Anne McCaffrey(1 Apr 1926)
2006Harlan Ellison(27 May 1934)
2007James Gunn(12 Jul 1923)
2008Michael Moorcock(18 Dec 1939)
2009Harry Harrison(12 Mar 1925)
2010Joe Haldeman(9 Jun 1943)

For further information, please see the SFWA Grand Masters Page.