It wasn't until two years after Doctor Strange was released that fans discovered Strange's wristwatch, which has a date on it. According to the fan discovery, Stephen Strange's fatal accident occurs on February 2, Groundhog Day, a day that Phil Connors relived over and over again in the famous comedy film. Considering that Doctor Strange also plays with time, the watch can be considered a reference to Groundhog Day. The director of the film, Scott Derrickson, admitted that he intentionally made the reference and was waiting for fans to find the hidden "Easter egg."