LONDON (CNN) - It's Queen Elizabeth's birthday.
Well, the official one, at least.
The official birthday celebration for the British monarch is marked by the annual Trooping the Color ceremony.
The Queen's actual birthday is April 21. She is 91.
The official birthday celebration is always held in June to take advantage of the weather.
The Queen always concludes the parade with an appearance on the Buckingham Palace balcony with the royal family.
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