Bill Murray was bitten by the groundhog twice during shooting. Murray had to have anti rabies injections, because the bites were so severe. According to Director Harold Ramis, most of the time, when he tried to explain a scene to Bill Murray, Murray would interrupt and ask, "Just tell me - good Phil or bad Phil?" Bill Murray was offered a spit bucket for the diner scene where he gorges himself on pastries, but he refused. The angel food cake, in particular, caused him to feel sick soon afterward. On the DVD, Harold Ramis states that the original idea was for him to live February 2nd for about ten thousand years. Later, he says that Phil probably lived the same day for about ten years. A breakdown of this day count and Ramis' thoughts can be found here: youtu.be/swJ-kNdtrdQ Harold Ramis directed the kids in the snowball fights to hit Bill Murray as hard as they could. Murray responded by throwing snowballs back as hard as he could. Harold Ramis originally wanted Tom Hanks for the lead role, but decided against it, saying that Hanks was "too nice".

All the clocks in the diner are stopped, mirroring Phil's predicament.

The scene where Phil picks up the alarm clock and slams it onto the floor didn't go as planned. Bill slammed down the clock, but it barely broke, so the crew bashed it with a hammer to give it the really smashed look. The clock actually continued playing the song like in the movie.

There are exactly 38 days depicted in this film, either partially, or in full.

When Phil takes the elderly man to the hospital, and talks to the nurse, a boy with a broken leg can be seen in the background. This is the same boy who falls out of a tree later on in the film, only this time, Phil catches him.

Chosen to be preserved by the National Film Registry in 2007.

Since the film's release, the town of Punxsutawney has now become a major tourist attraction.

A family of groundhogs was raised for the production.

The groundhog ceremony is depicted as occurring in the center of town. Gobbler's Knob, where the ceremony takes place in real-life, is a rural, wooded area, about two miles outside of Punxsutawney.

Unlike the scenes for the bed and breakfast, the scenes at the piano teacher's house were filmed inside the actual house, in the front room as it appears in the film.

The Swedish title of this movie translates as "Monday the entire week". The movie, however, does not specify what day of the week it is supposed to be, and Groundhog Day in 1993 was actually on a Tuesday.

In the 1880s, some friends in Punxsutawney, Pennsylvania went into the woods on Candlemas Day to look for groundhogs. This outing became a tradition, and a local newspaper editor nicknamed the seekers "the Punxsutawney Groundhog Club." Starting in 1887, the search became an official event centered on a groundhog called Punxsutawney Phil. A ceremony still takes place every year.

Ranked #8 on the American Film Institute's list of the 10 greatest films in the genre "Fantasy" in June 2008.

Premiere voted this movie as one of "The 50 Greatest Comedies Of All Time" in 2006.

In one scene, Connors throws himself from the bell tower of a high building. This building is actually an opera house in Woodstock, Illinois. Local legend has it that a ghost of a young girl haunts the building since a girl once fell off of the balcony section inside the opera house and died.

The "clocks" restaurant in Woodstock, Illinois, is now a Starbucks.

The store "Lloyd's", always seen in the background in the scenes where Phil encounters Ned Ryerson, tried to sue the production for several thousand dollars for lost business. They were unsuccessful.

The German title of the movie is "Und tglich grt das Murmeltier", which can be translated as "The groundhog greets every day". The title has been adapted in Germany as a humorous proverb, which is often used when something is frequently repeated, especially annoying or awkward things.

The house that was used for the piano teacher's house, is less than a block away from the house used for the bed and breakfast. Though not visible in the film, it is actually located on the street that Phil sees directly proceeding from his room window, just a few houses down on the left-hand side.

The ice sculptures featured in the movie (called Winged Victory) were carved by Randy Rupert, a.k.a. The Chainsaw Wizard. Randy is actually a Punxsutawney resident, and has a shop downtown. He can be found in the city park every Groundhog Day carving and selling his wooden sculptures.

The interior scenes of the Cherry Street bed and breakfast were not filmed inside the actual house. The only times the crew entered the house at all, were to turn on lamps for the proper lighting effects needed for the exterior shots.

Among Phil's books in the coffee shop are "Treasury of the Theatre: From Agamemnon to A Month in the Country" by John Gassner (Simon & Schuster, 1964), and "Johann Strauss: Father and Son, a Century of Light Music" by H.E. Jacob (Greystone Press, 1939). The classical piano piece that draws his attention in the same scene is Mozart's Piano Sonata No. 16 in C major, K. 545.

Came in at number 4 in the BBC Culture 100 best comedies of all time.

The second time Phil counts down to go on the air (after the groundhog sees his shadow), when he gets to "1" he holds up his middle finger, rather than his pointer.

Included among the American Film Institute's 2000 list of the Top 100 Funniest American Movies.

During a diner scene, a bumper sticker for "The Spirit" can be seen over Phil's shoulder. This is the name of the newspaper in Punxsutawney.

The end credits read "Filmed in Panavision", which is the requirement for films using anamorphic lenses, rather than "Filmed with Panavision Cameras and Lenses", for films that use spherical lenses.

The red Cadillac in the "no tomorrow" driving scene is a 1974 Cadillac Eldorado convertible with a non-stock grille. It is a front-wheel drive car, as can clearly be seen in the burnout at the start of the train track sequence. The Eldorado was equipped with rear-wheel drive from 1953 to 1966, then front-wheel drive from 1967 through the end of production in 2003.

Debbie and Fred's last names are given briefly as "Kleiser".

The Tip Top Cafe, where many indoor scenes took place, was a set created for the film, but it became an actual restaurant, the Tip Top Bistro, following the movie's success. Later, it became a coffee and Italian ice cream shop, and after that a fried chicken outlet.

In the German restaurant scene, when the waitress behind Phil is walking away from a customer she just served, she touches the customer on the shoulder and leaves some beer suds there. The second time there, she does the same thing, but no suds are visible.

Before the "Ned's corner" scene you can see a sign for Woodstock Jewelers, giving away the name of the town substituting for Punxsutawney.

Groundhog Day is February 2, which written in numeric form is a repeated number (2/2), while the number 2 is also used to refer to doing something again (e.g. "Take 2").

At the end of the alley scene in which Phil has given up trying to save the old homeless man, he looks upward and is clearly about to say something. The line was apparently cut for reasons unknown.

The trivia items below may give away important plot points.

In the final shot, Phil carries Rita over the gate and then climbs over it. This is because the gate was actually frozen shut.

Rita slaps Phil ten times during the course of the film.

The end party scene where everyone thanks Phil, was originally supposed to take place at Fred and Debbie's wedding, but it was changed for time constraints.

The old man is the only one to die and stay dead. Phil, the groundhog, and the old man are the only ones in the loop known to have died. The fate of the cops chasing Phil on the railroad tracks is not shown, but since there was no crash as the train went by, it's likely they got off in time.

In the narrative behind why Phil changes, and why he helps the people in Punxsutawney. Phil begins to understand why he is stuck in the twenty-four hour loop of February the Second, and he realizes that he must change and become a better person, and he uses his knowledge of the day's events to better himself, and the lives of the townspeople.

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Groundhog Day (1993) - Trivia - IMDb