The Woodstock Music and Art Fair, commonly referred to as Woodstock, was a music festival held from August 15 to 18, 1969, on Max Yasgur's dairy farm in Bethel, New York, 40 miles (65 km) southwest of the town of Woodstock. Billed as “an Aquarian Exposition: 3 Days of Peace & Music” and alternatively referred to as the Woodstock Rock Festival, it attracted an audience of more than 460,000. Thirty‐two acts performed outdoors despite overcast and sporadic rain. It was one of the largest music festivals in history and became synonymous with the counterculture of the 1960s.
WikiPedia

Well, I came upon a child of God
He was walking along the road
And I asked him, “Tell me, where are you going? ”
And this he told me
Said, “I'm going down to Yasgur's Farm
Gonna join in a rock 'n' roll band
Got to get back to the land
Set my soul free”
Joni Mitchell, Woodstock

Woodstock, Crosby, Stills and Nash

The Star Spangled Banner, Jimi Hendrix

Bobby McGee, Janis Joplin

I Put A Spell On You, Creedence Clearwater Revival

Evil Ways, Santana

Somebody To Love, Jefferson Airplane

A Look At: Woodstock