The Dutch Royal Family Attend King's Day

ZWOLLE, NETHERLANDS - APRIL 27: (L-R) Princess Catharina-Amalia, Princess Alexia, Princess Ariane, Queen Maxima and King Willem-Alexander of The Netherlands watch a performance during celebrations marking the 49th birthday of the King on King's Day on April 27, 2016 in Zwolle, Netherlands. (Photo by Michel Porro/Getty Images)