The announcement was officially established in 1970, during the General Assembly of UNESCO. The cause of the proclamation is to increase access to books. The logo of the event was celebrated by the issuance of postage stamps by several countriesCAVALCANTI, Cordélia Robalinho. de Oliveira; CUNHA, Murilo Bastos da. Dicionário de Biblioteconomia e Arquivologia. Brasília, Briquet de Lemos Livros, 2008, página 17.
