The Queen is celebrating her 94th birthday today - but in just a few weeks she'll be doing it all again. That's because the Monarch actually has two birthdays - her 'actual' birthday and her 'official' birthday.
But why does the Queen have two birthdays? On April 21, the day she was born, she has a private celebration with members of the Royal Family.
But she has been known to make a rare public appearance on her birthday. In 2006, Her Majesty took a walk outside Windsor Castle so she could greet well-wishers on her 80th.
Although she tends to keep to herself on this day, the occasion is still marked publicly by gun salutes in central London at midday.
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