From the liner notes

Glastonbury is now the best known, longest running and most pre-eminent music festival in the world. Fuelled by a staggering range of music, the movie will embrace the spirit, characters and overwhelming experiences of the festival as it reflects the extraordinary world changes of the last three decades.

In 1970, a young farmer named Michael Eavis opened his 150-acre farm to 1,500 people who paid one pound each to watch a handful of pop and folk stars perform all weekend long, and the Glastonbury Festival was born. The following year, several rich hippies, including Winston Churchill's granddaughter, provided funds to enlarge the event, and 12,500 people turned up to see David Bowie and Joan Baez. For most of the past 30 years, the Worthy Farm in Glastonbury has provided a delirious outdoor concert for thousands of people over the summer-solstice weekend at the end of June. Julien Temple (director of the Sex Pistols documentary The Filth and the Fury) spent a few years collecting footage from every single Glastonbury Festival, ranging from professional outtakes from the film Nicolas Roeg made about the 1971 event to amateur home videos collected from the attendees themselves, often retrieved from forgotten corners of closets and attics. Interweaving images of impromptu art happenings, skeptical locals, and stirring performances by music legends, not to mention the unbridled energy of each successive generation of youthful music fans, Glastonbury skillfully chronicles the evolution of the longest-running music festival in the world.