Congress of South African Trade Unions (COSATU), May Day, 1990.Silkscreen poster. Place of production and printing unknown. Artist unknown. After COSATU had initiated a campaign to have May Day recognised as a public holiday in 1986, the South African government declared May Day as an official public holiday in 1990. This poster celebrates this victory by the labour movement. Collection: CHR/UWC-Robben Island Museum Mayibuye Archives