Deliberate mistake: When Phil wakes up at 6 AM, it's already bright outside. At 6 AM in February, it would still be pitch-dark.
Groundhog Day (1993)
Ending / spoiler
Directed by: Harold Ramis
Starring: Bill Murray, Andie MacDowell, Stephen Tobolowsky, Chris Elliott
Exhausted after endlessly spending the same day over and over in debauchery, seduction, and eventual ineffective suicide attempts, Phil changes. Every day he befriends an elderly dying homeless man, catches a boy falling from a tree, performs a lifesaving Heimlich Maneuver, encourages a soon-to-be-married couple having cold feet, etc. During his busy day, he learns to play the piano and ice sculpt, and falls in love with Rita. One day, Rita, dazzled by the change in Phil, "buys" him for the evening in the fund-raising bachelor auction. That evening she sees the change in Phil and learns of his love for her; they eventually fall asleep in Phil's bed without "doing anything." He has finally lived the day perfectly; he wakes up on the day after Groundhog Day with Rita in his arms.
Guy Holladay
More mistakes in Groundhog Day
Phil Connors: What if there is no tomorrow? There wasn't one today!
Trivia: Bill Murray was bitten by the groundhog twice during shooting.
Question: Toward the beginning of the movie, on Phil's first day at the bed and breakfast, he turns on the shower and it is very cold. He asks the lady in the hallway why there is no hot water. The lady answers "Oh no, there wouldn't be any today." Why not?
Answer: Likely because there are a lot of people staying there and using up the hot water.
Answer: Old fashioned hotels have a single boiler for all the hotel rooms. Once the hot water reservoir is used up there won't be any more to use until the reservoir is refilled. This only happens once every few days.
lionhead