Definition of day for night in English English dictionary
A cinematographic technique in which a crew films in a high-contrast situation, typically in the early morning or late afternoon, with a blue filter, causing the scene to look as if it were shot in moonlight
In the daytime, with a blue filter, causing the scene to look as if it were shot in moonlight
The Sandcrawler scene in Star Wars Episode IV: A New Hope was shot day for night.