Koningsdag (King's day) in the Netherlands NETHERLANDS
April 27
Koninginnedag or King's Day is a national holiday in the Kingdom of the Netherlands. Celebrated on 27 April (the 26th if the 27th falls on a Sunday), the date marks the birth of King Willem-Alexander. Koningsdag is known for its nationwide vrijmarkt ("free market"), at which many Dutch sell their secondhand items. It is also an opportunity for "orange madness" or oranjegekte, for the national colour, when the normally strait-laced Dutch let down their hair, often dyed orange for the occasion.