King’s Day 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. When the Dutch monarch is female, the holiday is known as Koninginnedag) or Queen’s Day and, under Queen Beatrix until 2013, was celebrated on 30 April. On the occasion of the birthday of His Majesty King Willem Alexander…