May Day in Kreuzberg refers to the street festivals and demonstrations organized by left-wing and far-left groups on May 1, International Workers' Day, in the Berlin district of Kreuzberg. Specifically, the term may refer to the 1 May 1987, when particularly severe rioting in Kreuzberg led to the Berlin police having to completely withdraw from the eastern area of Kreuzberg, SO 36, for several hours. Since then, autonomists and anti-fascist groups have held so-called "Revolutionary 1st of May Demonstrations" almost every year.