Updated: July 21, 2010

In 1969 in small town Bethel, New York, 500,000 eager concert goers flocked to one of the most iconic music events in history, the Woodstock Music & Art Fair. Many count Woodstock, as it is often called, as one of the most important events for rock and roll and pop culture in the sixties.

Perhaps most recognizable to people today are the images of tie-dye and daisy clad youth in their trek toward rock mecca, or throngs of fans surrounding the stage, dancing with others in the pouring down rain. Woodstock is legendary not only in its size, however, people also remember it for the freedom the concert exemplified.

More than just a free concert, the festival became an emblem of liberation and the culture of the time. It was also an important time for music. The three day set list included 32 acts who defined the era and the rock genre. Bands including Creedence Clearwater Revival, Grateful Dead, Joan Baez, The Who, Janis Joplin and Jimi Hendrix played for the rain soaked crowds.

Now, in 2009, people are commemorating this historical event in music history that helped define a generation. To learn more about Woodstock and how people are paying tribute to the anniversary, check out the quiz below.