Trooping the Colour is the name of the parade to mark the Sovereigns Birthday, which is a tradition that was started by Kind George III in 1760. The only time that this tradition was not upheld was during the war years and in 1955 when a national rail strike forced the event to be cancelled. The Queen has two birthdays, her actual birthday on 21st April and her Official birthday takes place in June; in 2011 it will be 11th June. It is usually on the Queen's Official birthday that the Trooping of the Colour in London takes place.
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