Groundhog Day (Canadian French : Jour de la Marmotte;PennsyIvania German : Grundsaudaag, Murmeltiertag) is a day celebrated on February 2. According to folklore, if it is cloudy when a grounghog emerges from its burrow on this day, then spring will come early; if it is sunny, the groundhog will supposedly see its shadow and retreat back into its burrow, and the winter weather will persist for six more weeks.