For the scenes inside the university hospital, the sets had to be rebuilt from scratch for this film, as the actual hospital used in the first film had been gutted.
Like in the first film where Carter announces the story bearing similarities to the plot of Groundhog Day, he establishes the similarities with this sequels' plot to Back to the Future Part II (1989).
There are also some small nods to the film, like the wood chipper being from "Biff's Tree Removal", and also a clock tower scene.
Christopher Landon announced plans for a third film as soon as production wrapped.
Tree's shirt says FML on it but in certain photos promoting the film this was changed to OMG.
The initial worldwide release date was to be Valentine's Day, however in the United States due to a recent tragedy the film's premiere was set to the previous day of February 13th, 2019.