Groundhog Day (Pennsylvania German: Grundsaudaag, Murmeltiertag) is a day celebrated on February 2. According to folklore, if it is cloudy when a groundhog 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 continue for six more weeks.
Modern customs of the holiday involve celebrations where early morning festivals are held to watch the groundhog emerging from its burrow.