It was "3 Days of Peace and Music."
But, it was really four. Woodstock did not wrap up until it was almost noon on Monday morning. The final performer, Jimi Hendrix, played in broad daylight.
The crowd, which had been estimated at around 400,000 at its peak, had shrank to about 30,000.
But, the people who stayed got one of the most legendary performances of all time. Two years earlier, Hendrix exploded onto the scene with a (literally) fiery performance at the Monterey Pop Festival. By the time he got to Woodstock, he was one of the biggest performers in the world.
A storm the day before pushed his set back several hours. The Band's Levon Helm would later note that Hendrix, who was contracted to perform last, was not happy about the delay.
Despite the relatively small audience, Hendrix would deliver the most memorable song of the festival.
Hendrix's version of The Star-Spangled Banner is widely regarded as the defining moment of Woodstock. For many, it was the defining moment that capped off the 1960's in music and is considered by some to be the greatest guitar performance of all time. Of course, at the time, the distortion and feedback heavy sound was not admired by all.