When did the first seven astronauts go to space?

Alan Shepard - MR-3 (Freedom 7) May 5, 1961 and Apollo 14, launched on January 31, 1971 and returned to earth on February 9, 1971.

Virgil (Gus) Grissom - MR-4 (Liberty Bell 7) July 21, 1961 and Gemini 3 which launched on March 23, 1965.

John Glenn - MA-6 (Friendship 7) launched February 20, 1962 and STS-95 launched October 29, 1998 and returned on November 7, 1998.

Scott Carpenter - MA-7 (Aurora 7) launched May 24, 1962.

Walter Schirra - MA-8 (Sigma 7) launched October 3, 1962. Gemini 6A December 15-16, 1965. Apollo 7 October 11-22, 1968.

Gordon Cooper - MA-9 (Faith 7) May 15-16, 1963, and Gemini 5 August 21-29, 1965.

Donald (Deke) Slayton - Apollo-Soyuz Test Project - July 15-24, 1975.