Oskari Tokoi, Finnish socialist and the Chairman of the Senate of Finland (died 1963)

Antti Oskari Tokoi was a Finnish socialist politician who served as a leader of the Social Democratic Party of Finland. Tokoi became Chairman of the Senate of Finland in 1917, and thus, he was the world's first social democratic leader of the government. During the short-lived Revolution of 1918, Tokoi participated as a leading figure in the revolutionary government. Tokoi later emigrated to the United States, where he served as the long-time editor of Raivaaja, the newspaper of the Finnish Socialist Federation.

May 15 is the 135th day of the year in the Gregorian calendar; 230 days remain until the end of the year.