<P> Groundhog Day , ( Pennsylvania German : Grund'sau dåk , Grundsaudaag , Grundsow Dawg , Murmeltiertag ; Nova Scotia : Daks Day ) is a popular tradition celebrated in the United States and Canada on February 2 . It derives from the Pennsylvania Dutch superstition that if a groundhog ( Deitsch : Grundsau , Grunddax , Dax ) emerging from its burrow on this day sees a shadow due to clear weather , it will retreat to its den and winter will persist for six more weeks , and if it does not see its shadow because of cloudiness , spring will arrive early . While the tradition remains popular in modern times , studies have found no consistent correlation between a groundhog seeing its shadow or not and the subsequent arrival time of spring - like weather . </P>
what does it mean groundhog sees his shadow
winter will persist for six more weeks