Vellikizhamai Viratham (transl. Fast on Friday) is a 1974 Indian Tamil-language Hindu devotional film, directed by R. Thyagarajan and produced by Sandow M. M. A. Chinnappa Thevar under Dhandayudhapani Films. The dialogue was written by Aaroor Dass and the story was written by Thevar. Music was by Shankar–Ganesh. It stars Sivakumar, Jayachitra and Jayasudha, with Nagesh, Sundarrajan, Srikanth and Sasikumar in supporting roles. The film was remade in Telugu as Nomu (1974) and in Hindi as Shubh Din (1974).