Groundhog Day opened in theatres on Feb. 2, 1993, but it was set on Groundhog Day 1992 - exactly 20 years ago today.

The beloved comedy has stood the test of time and then some: Groundhog Day has become a nostalgic favorite of those who saw it in theatres, and - with the help of a 15th Anniversary DVD reissue - found fans among those who can't remember when Bill Murray had a full head of hair.

On Groundhog Day 2012, residents of Woodstock, Ill. - which was transformed into Punxsutawney, Penn., to film the Bill Murray classic - are spending the week commemorating the Hollywood invasion with multiple Groundhog Day screenings, walking tours, a chili cook-off, and more.

There is some kind of weird chemistry with Woodstock and the movie, longtime resident Rick Bellairs, who was an extra in the movie, told the Chicago Tribune. The movie has become a classic unto its own, but Woodstock has a special place in that because they were here for three or four months filming.

The main event of Woodstock's Groundhog Days celebration is Thursday morning's prognostication with the town's very own groundhog, Woodstock Willie. (Who for the record, did NOT see his shadow, unlike Punxsutawney Phil). On Friday night, the town will host the Shake of the Winter Blues Celebration, a charity dinner dance at the Woodstock Moose Lodge -- where Murray danced with Andie Macdowell.

The film showcases our city so well, Pam Moorhouse, chairwoman of the Groundhog Days Committee, told the Tribune. People watch the movie and can envision themselves in those roles as they walk around.

Some locations featured in the movie have plaques indicating they were used for scenes, including the Alpine Theatre and the Tip-Top Café.

Groundhog Day, directed by Harold Ramis, has a 96% rating on Rotten Tomatoes. Bill Murray won an MTV Movie Award for Best Comedic Performance, as disgruntled weatherman Phil Connors.

Check out the Groundhog Day trailer here --  it's so good you'll want to watch it over and over again!