 This was followed by the dissolution of the Netherlands Antilles in 2010, which created the new special municipalities of Bonaire, Sint Eustatius, and Saba, and the two new constituent countries of Curaçao and Sint Maarten.On Koninginnedag ("Queen's Day"), 30 April 2013, Beatrix abdicated in favour of her eldest son, Willem-Alexander.At the time of her abdication at age 75, Beatrix was the oldest reigning monarch in the country's history.