Oxegen

Oxegen is a music festival in Ireland, first held from 2004–2011 as a rock and pop festival and again in 2013 with dance and chart acts only. The event is regularly cited as Ireland's biggest music festival, and, by 2009, it was being cited as the greenest festival, being a 100% carbon neutral event in Ireland. It was previously called Witnness, which ran from 2000 and was sponsored by Guinness. The event is promoted by MCD and is sponsored by Heineken. Oxegen was originally a three-day festival, but from 2008 onwards, it was expanded to four days.