This page lists historical and other events on August 12th in Catalonia and the Catalan-speaking countries as well as a list of births and deaths of well-known Catalans..
1888 - Barcelona: the socialist trades union the Unió General de Treballadors (UGT) is founded.
1906 - The first regular bus line in Barcelona.
1932 - Palma: A demonstration in Plaça de Cort in favour of the Second Spanish Republic.
1982 - el País Valencià: Joan Lerma becomes President of the Provisional Valencian Generalitat.
1879 - Barcelona: August Pi i Sunyer, Catalan physiologist, politician and sports manager (died 1965).
1897 - Algemesí (la Ribera Alta): Josep Moreno i Gans, Valencian composer (died 1976).
1897 - La Garriga (Vallès Oriental): Manuel Blancafort i de Rosselló, Catalan composer (died 1987).
1920 - València: Francesc Martí Grajales, Valencian journalist, essayist and intellectual (n. 1862).
Ademús: Festival in honour of the Assumpció de la Mare de Déu, which is celebrated on August 15th.