The 2012 Summer Olympic Games, officially the Games of the XXX Olympiad, also known informally as London 2012, began in London, United Kingdom on 27 July and will continue until 12 August 2012. The first event, the group stages in women's football, began two days earlier, on 25 July. More than 10,000 athletes from 204 National Olympic Committees are expected to participate.
http://en.wikipedia.org/wiki/2012_Summer_Olympics Less