December 1: World AIDS Day (2024); Great Union Day in Romania; Rosa Parks Day in some states and cities in the United StatesJuan Lavalle1828 Returning to Buenos Aires with troops who fought in the Cisplatine War, Juan Lavalle (pictured) deposed provincial governor Manuel Dorrego, reigniting the Argentine Civil Wars.1918 With the signing of the Act of Union, Denmark recognized the Kingdom of Iceland as a fully sovereign state in personal union through a common monarch.1923 The Gleno Dam in the Italian province of Bergamo failed due to poor workmanship, flooding the downstream valley and killing at least 356 people.1971 A period of political and economic reforms in the Socialist Republic of Croatia came to an end as the League of Communists of Yugoslavia decided to purge the state's reformist leadership.1988 Five armed men hijacked a bus carrying schoolchildren and a teacher in Ordzhonikidze (now Vladikavkaz, Russia), and were later given an Ilyushin Il-76 aircraft and ransom for the release of the hostages.Saint Eligius (d.660)Martin HeinrichKlaproth (b.1743)Edwin FrancisJemison (b.1844)Masao Horiba (b.1924)More anniversaries: November 30December 1December 2ArchiveBy emailList of days of the yearAbout