ZWOLLE, NETHERLANDS - APRIL 27: King Willem-Alexander of The Netherlands attends celebrations marking his 49th birthday on King's Day on April 27, 2016 in Zwolle, Netherlands. (Photo by Michel Porro/Getty Images)
ZWOLLE, NETHERLANDS - APRIL 27: King Willem-Alexander of The Netherlands attends celebrations marking his 49th birthday on King's Day on April 27, 2016 in Zwolle, Netherlands. (Photo by Michel Porro/Getty Images)