"Day for Night" is a filmmaking technique used to simulate nighttime scenes while filming during the day. This is achieved by using specific camera filters and adjusting lighting to create the illusion of darkness. The technique allows filmmakers to maintain a consistent shooting schedule without being limited by natural light conditions. The term is also associated with the 1973 film "Day for Night" directed by François Truffaut. The movie explores the behind-the-scenes challenges of making a film, showcasing the interactions among the cast and crew. It highlights the complexities of filmmaking, including the creative process and the personal dynamics involved.