By Day and by Night
- Cast: Gala Montes, Manuel Balbi, Sandra EcheverrÃa, Fernando Becerril, Ari Brickman
- Duration: 96 minutes
- Genre: Science Fiction, Drama
- Rating: 4.5/10
- Release Date: 2010-10-19
A Mexican science fiction film where the over-population problem has been solved by programming people to operate in either day or night, and not both.
