Customes and traditions in Britain

It is every boy and girl's dream to have two birthdays in one year; well, Queen Elizabeth is very lucky because she has two birthdays, one in April and one in June.
Why does Queen Elizabeth have two birthdays? The Queen's actual birthday is on 21 April, she was born on 21 April 1926. But also she has official birthday. It has long been customary to celebrate the Sovereign's birthday publicly on a day during the summer, when better weather is more likely.
Since 1805, the Sovereign’s 'official' summer birthday has been marked by the Trooping the Color ceremony, which is also known as the Queen's Birthday Parade, and is normally held on the second Saturday in June.