April 20, 1890
1890 battle between Babatu and Builsa people
1890 in film — overview of film-related events during the year of 1890
World Chess Championship 1891 — chess match between Wilheilm Steinitz and Isidor Gunsberg
Massacre in South Australia
1892-1899 miners' strikes in Idaho, United States
Convention of Calcutta
Treaty of 1890 between Peru and Ecuador
1890 British-German treaty
Uprising in Argentina on July 26, 1890
Wounded Knee Massacre — violent attack on Lakota Indians in 1890 by the United States Army