King's Day is called Koningsdag in Dutch. It is held every year on the birthday of the King of the Netherlands, 27 April. It was first held in Utrecht on 31 August 1885 in honour of Princess Wilhelmina, as Prinsessedag (Princess Day). At that time the event was a kind of garage sale combined with a carnival with food and game stalls, music and shows. The tradition survived and spread throughout the country. The date of the celebrations now changes according to the reigning monarch: since 2013, with the accession of King Willem-Alexander, King's Day is celebrated on 27 April.
Today, King's Day is synonymous with celebration throughout the Netherlands. Every year, the King joins the crowds in one of the country's cities and walks through the organised activities.