Queen Elizabeth's Birthday

This is an interesting article regarding Queen Elizabeth.
Queen Elizabeth II will mark her 83rd birthday on Tuesday with a low-key day at Windsor Castle, but she won't have the day off work.
The queen's London office said the monarch has nothing special planned or any public engagements scheduled, but she will probably go through the stack of official papers she receives as head of state. She has long done that every day of the year, except Christmas.
A royal salute will be fired at noon in Hyde Park in central London to mark the occasion by the King's Troop of the Royal Horse Artillery.
The queen's birthday is celebrated twice a year - once privately, on her actual birthday, and again with an official national celebration in June.
Since the 18th century, British monarchs have been publicly celebrating their birthdays in June, no matter when they were actually born, in hope of good weather for public events.
As consort, Prince Philip does not have a constitutional role, but he supports his wife and accompanies the queen to public engagements and on foreign tours. They have been married for more than 60 years.