Great sites
Mistakes
When Phil comes around the corner, just before meeting Ned, there are two women walking together in the background. The one in blue is holding a yellow sign upside down that says Phil (the groundhog, not the character). The first 3 days in a row they are together as they should be. On the forth day and every day thereafter the woman in blue is by herself which does not follow the exact day sequences. See more...
Trivia
I'm not sure if this was done intentionally, but in the scene where Phil is eating a table full of sweets, talking to Rita, as the camera pans in on Phil, there are 2 clocks on his immediate left. Both look like they indicate the same time, but one says 5:55, and one says 11:30. Notice that the angle of each hand is the same, but the little and big hands are switched. Neat trick if it was done on purpose. See more...
Phil Connors: What if there is no tomorrow? There wasn't one today!