Eisenhower was a golf enthusiast later in life, and joined the Augusta National Golf Club in 1948. He played golf frequently during and after his presidency and was unreserved in expressing his passion for the game, to the point of golfing during winter; he ordered his golf balls painted black so he could see them better against snow on the ground. He had a small, basic golf facility installed at Camp David, and became close friends with the Augusta National Chairman Clifford Roberts, inviting Roberts to stay at the White House on several occasions. Roberts, an investment broker, also handled the Eisenhower family's investments. Roberts also advised Eisenhower on tax aspects of publishing his memoirs, which proved financially lucrative.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): When did Eisenhower join Augusta National?
1948