According to British tradition for monarchs Queen Elizabeth II celebrates her birthday twice.
The actual date of birth of the Queen can celebrate in a close circle of family, but one Saturday of June in the UK held a parade in honor of the official birthday of Queen Elizabeth II. The second celebration is equivalent to national holidays.
In 2016 the Queen turned 90 years old. June 11, before it was the horse artillery, guards of Buckingham Palace and even flying a British aircraft
Completed a three-day celebration of the so-called official birthday of the British Queen Elizabeth II was the largest in the history of the United Kingdom a secular feast. Holding a Royal dinner under the open sky did not stop even typical UK drizzling rain. In order to cope with the vagaries of the changeable British weather, the organizers of the picnic ordered for guests more than 12 thousand raincoats.
To go for lunch to the Queen either had received an invitation through one of the charities, or to purchase one of for sale of tickets.
By the way, in celebration with the Queen was her husband Prince Philip, son Prince Charles, grandson William with his wife Kate Middleton and their children, Prince George and Princess Charlotte.