Dutch prince Willem Alexander and his wife princess Maxima pose with people dressed as clowns in Rhenen, Netherlands on April 30, 2012, during the Queens Day celebration.  Queen's Day is a national holiday in the Netherlands, on the 30th April (or on the 29th if the 30th is a Sunday). Queen's Day celebrates the birthday of the Queen of the Netherlands. The tradition started on 31 August 1885, on the birthday of Princess Wilhelmina, later Queen Wilhelmina. AFP PHOTO/ KOEN VAN WEEL netherlands out - belgium out        (Photo credit should read Koen van Weel/AFP/Getty Images)