Day of Anger (Italian: I giorni ell'ira), also known by its UK video title Gunlaw, is a 1967 spaghetti western film directed by Tonino Valerii. The film stars Lee Van Cleef and Giuliano Gemma, and features a musical score by Riz Ortolani. The film is based on the novel Der Tod Ritt Dienstags by Ron Barker.