The Olympic Games are a set of international sports competitions which take place every four years, each time in a different country.
London 2012 began its 500-days-to-go celebrations yesterday with the unveiling of the OMEGA countdown clock in Trafalgar Square. As official timekeeper for the London 2012 Games, OMEGA has provided a large countdown clock that will allow Londoners to see the days, hours, minutes and seconds until London’s big day on 27 July 2012 – the day of the Opening Ceremony of the London 2012 Olympic Games.

