The May Revolution happened from May 18 to 25, 1810, in Buenos Aires. Buenos Aires was the capital of the Viceroyalty of the Río de la Plata. It was a Spanish colony that included roughly the territories of present-day Argentina, Bolivia, Paraguay and Uruguay. The result was the removal of Viceroy Baltasar Hidalgo de Cisneros and the forming of a local government now called the "Primera Junta". In Argentina this is now celebrated as "May Week" ().