Punxsutawney Phil, the "seer of seers and prognosticator of prognosticators," is a groundhog resident of Punxsutawney, Pennsylvania, USA. On February 2, (Groundhog Day) of each year, the town of Punxsutawney celebrates the beloved groundhog with a festive atmosphere of music and food. During the ceremony, which begins well before the winter sunrise, Phil emerges from his temporary home on Gobbler's Knob, located in a rural area about 2 miles east of town. According to the tradition, if Phil sees his shadow and returns to his hole, the United States will have six more weeks of winter. If Phil does not see his shadow, spring will arrive early. The date of Phil's prognostication is known as Groundhog Day in the United States and Canada. During the rest of the year, Phil lives in the town library with his "wife" Phyllis.

A club of Phil enthusiasts, known as the Punxsutawney "Save the Bearded Owls" Club, take care of the famed rodent year-round. A select group, called the Inner Circle, also plan the annual ceremony. Members of the Inner Circle are recognizable by their top hats and tuxedos.