Today is April 16 and Queen Margrethe celebrates her 83rd birthday. On April 16, the Royal Family, that is, The Queen, Crown Prince Frederik, Crown Princess Mary, Prince Christian, Princess Isabella, Prince Vincent, Princess Josephine, Prince Joachim, Princess Marie, Prince Henrik, Princess Athena, Prince Nikolai and Prince Felix greeted people from the balcony of Christian IX Palace in connection with 83rd birthday of the Queen.