Continuity mistake: On the third and fourth day, Carter's roommate shows up earlier than the first 2 days. And Tree's suspect tips notebook every day don't reset and the line and erases are the same.
Happy Death Day (2017)
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Directed by: Christopher Landon
Starring: Israel Broussard, Jessica Rothe, Ruby Modine, Charles Aitken, Rachel Matthews
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More mistakes in Happy Death Day
Lori Spengler: How did you figure it out?
Tree Gelbman: Because you've killed me before.
Lori Spengler: Then I guess I'm just going to have to do it again.
Trivia: There actually is an in-universe explanation for why Tree got stuck in a time-loop. However, director Christopher Landon opted to omit it from the finished film. Partially because it could be used in a potential sequel, and partially because it wasn't necessary for the narrative. Landon has hinted that the upcoming sequel, "Happy Death Day 2U," will finally reveal the explanation.
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