David Crosby, Stephen Stills and Graham Nash formed a loose group in 1968 after the demise of their former bands. After their first album was released in May 1969 (simply called Crosby, Stills & Nash) Neil Young joined them, too. Though the quartet was incredibly successful, the musicians rather paid attention to their individual solo careers.
Luckily the formation of CSN&Y made it to Woodstock, too. It was only their second gig[1] and they were quite nervous on stage. Stephen Stills remarked: “This is the second time we’ve ever played in front of people, man. We’re scared shitless.“
The group played separate acoustic and electric sets. Neil Young joined them in the middle of the acoustic set. They performed in the night from Sunday to Monday, the start time is supposed to be 3:00 am.