One Day of Life (Spanish: Un Dia en la Vida) is a novel by Salvadoran author Manlio Argueta. The novel is set in Chalatenango, El Salvador and follows the daily life of Guadalupe Guardado and the women of her family just prior to the Salvadoran Civil War. The book was banned by the government of El Salvador after its 1980 release for its descriptions of human rights violations by the Organización Democrática Nacionalista, the government's paramilitary intelligence organization.