| In the evening of April 9, 2018, King Willem Alexander, Queen Maxima, Prince Constantijn and Princess Beatrix attended the annual King's Day concert (Koningsdag) at the Oosterpoort in Groningen. Every year, the concert is held in the county where the Dutch Royal Family will celebrate King’s Day on April 27th. King's Day or Koningsdag is a national holiday in the Kingdom of the Netherlands. Celebrated on 27 April (26 April if the 27th is a Sunday), the date marks the birth of King Willem-Alexander. |
