Factual error: In the beginning a calendar says 2019 April, you can see April 1 being Tuesday when actually April 1 2019 is Monday.
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Mistakes
In the beginning a calendar says 2019 April, you can see April 1 being Tuesday when actually April 1 2019 is Monday. See more...
Daybreakers mistakes
Continuity: At 1:02:38, you see that the front door is closed. The scene after, when Lionel goes out of the water tank where they were hiding, the same door is now wide open. Then a bat scares him, and you see that the door magically closed back.
Continuity: The film opens with a girl writing on a notepad. The first shot from above shows that she's writing on the middle of the pad. Cut to a close-up of her hand and she's writing on the left side of the pad, very close to the edge.