 Mariano Moreno is regarded as the first Argentine journalist , as he created the Gazeta de Buenos Ayres . June 7 , the day this newspaper was first available to the public , is recognized in Argentina as " Journalist day " since 1938 . The Gazeta , however , was not the first newspaper in Buenos Aires , but the first one since the May Revolution . The first newspaper was the Telégrafo Mercantil ( 1801 ) , followed by the Semanario de Agricultura Industria y Comercio ( 1802 ) and the Correo de Comercio de Buenos Aires ( 1810 ) , edited during the colonial period . 
