Day of Anger (Italian: I giorni dell'ira, lit. "The Days of Wrath"), also known in the UK as Blood and Grit and Gunlaw, is a 1967 Italian-German Spaghetti Western film directed and co-written by Tonino Valerii and starring Lee Van Cleef and Giuliano Gemma, and features a musical score by Riz Ortolani. The film credits the novel Der Tod ritt dienstags (Death Rode on Tuesdays) by Ron Barker (Rolf O. Becker) as its basis, although Valerii and screenwriter Ernesto Gastaldi have attested that this credit was primarily included to appease the West German co-producers, and that the film is not an adaptation of Becker's novel.