At which major music festival did U2 headline for the first time in 2011?

U2 headlined Glastonbury Festival for the first time in 2011.

The band performed on the Pyramid Stage on June 24, 2011, opening the festival’s main headline schedule that year. It was U2’s first appearance as a headlining act at Glastonbury, one of the United Kingdom’s largest and most internationally recognized music festivals.

The performance was part of U2’s 360° Tour, although the group had to adapt its production after Bono suffered a back injury in 2010. U2’s Glastonbury set included major songs from across its career, including material from The Joshua Tree and Achtung Baby.

Glastonbury is sometimes confused with other British festivals where U2 have appeared or been discussed as potential performers. The 2011 event is specifically notable because it marked the band’s first Glastonbury headline performance.