The painting featured in the movie at the beginning is titled "The Triumph of Death".

The title of the movie is inspired on the quote of First Thessalonians 5:2, which says "the day of the Lord so comes as a thief in the night".

The movie premiered at the 2017 Overlook Film Festival.

There is a picture hanging in the hallway that is a tribute to Lil Wayne's Carter IV.

Joel Edgerton's character states that he was a teacher before the world started falling apart. Joel Edgerton's character was a teacher in the movie Warrior (2011).

For a majority of the movie every time Travis is dreaming the screen becomes cinema-scope style, transitioning out of cinema-scope style when he wakes up.