From Wikipedia entry:
"Turn! Turn! Turn! (To Everything There Is a Season)," often abbreviated to "Turn! Turn! Turn!," is a song written by Pete Seeger, wherein Seeger set text from the Bible to music, specifically, a reading from the Book of Ecclesiastes, 3:1–8. Although he wrote it in the 1950s, Seeger waited until 1962 to record it, releasing the song on his The Bitter and The Sweet album on Columbia Records. A famous version is the chart-topping single by The Byrds, released in October of 1965, and one of the defining records of the entire decade.
This was the second #1 hit for The Byrds (after "Mr. Tambourine Man"). Here they are on "Toast of the Town" (Ed Sullivan's show) on December 12, 1965 (a Sunday). And a broadcast quality stereo footage version of that same performance is available at YouTube. McGuinn really looked like a
In 1990, about a year before being inducted into the Rock and Roll Hall of Fame, Chris Hillman, David Crosby, and Roger McGuinn reunited for a Roy Orbison tribute concert. They did "Mr. Tambourine Man," with Dylan, and a great version of "Turn! Turn! Turn!":