Watch Tradiciones Mexicanas: Dia de Muertos (2008) : Full Movie Online Free This eye-opening documentary traces the roots of the famed Mexican holiday Día de los Muertos, or Day of the Dead. Dating back to an Aztec festival devoted to a goddess known in English as "The Lady of the Dead," the day finds families and friends gathering to pray for loved ones who have passed on. In addition to capturing the vivid collection of food and macabre decorations, this film reveals traditions of modern-day celebrations.