Peace One Day organized a concert in the O2 Arena in 2011 which promoted the 2012 (London 2012's Olympic Truce programme and marked the International Day of Peace [REF].
The Peace One Day Celebration and concert on Peace Day 2012, the day of Global Truce, was held at Wembley Arena, with headline acts including Elton John, James Morrison and 2Cellos [REF].