According to the RoyalBlog.nl:
The gun salutes – from the Tower of London and across the United Kingdom – will have to wait…. Queen Elizabeth II can celebrate her 87th birthday in peace and quiet Sunday, and in private, together with Prince Philip.
The Queen shows no signs of slowing down much, in this the 61st year of her reign and the 60th since her coronation. Last year, in her Diamond Jubilee year, she carried out 425 engagements, considerably more than in 2011, when she carried out 370.
To read the entire article on the RoyalBlog.nl, please click here.