When did Carter die? Did I miss that?
"November 4, 1991"
"This date marked the first time in American History that five living Presidents were photographed together. President Ford, Nixon, Bush, Reagan, and Carter posed for this historical picture at the opening of the Ronald Reagan Presidential Library."
This curious practice dates back to 1981 when all four living presidents gathered at the White House before Egyptian leader Anwar Sadat's funeral and later autographed copies of the photo. But it turned into a more coordinated effort, with a pre-set limit on the number of copies, when the presidential club gathered in 1991 for the dedication of Ronald Reagan's library in Simi Valley, Calif.