Electric Daisy Carnival is an annual electronic dance music festival held in the southwestern United States in the month of June. The event was held in southern California from 1997 to 2010, and was moved to Las Vegas in 2011. In 2009, the festival was expanded to a two day event, which brought in 130,000 attendees. In 2010, the festival attracted a total of 185,000 attendees. The Las Vegas event lasted 3 days in 2011, attracting 240,000 people.