If there is no sun and the groundhog does not see it's shadow he will stay out and spring will come early. Some people think that watching for groundhogs is a very reliable way of predicting when spring comes. Others believe that groundhogs can't really tell. February 2nd each year, according to rural American tradition the groundhog emerges from its burrow where it has been hibernating to discover whether or not cold weather will continue. Groundhog day is based on custom brought from Germany and England.
Some people believe that animals can predict the weather.
Before the holiday groundhog day was around, people were celebrating Hedgehog day. It was the light of the moon that caused the shadow to appear because the hedgehogs are nocturnal. Over the next 15 centuries, the hedgehog myth faded, although the hedgehog continued to appear in literature, coins, and later stamps. Even though the hedgehog myth faded, it reappeared in North America. Punxsutawney Tradition Punxsutawney Pennsylvania is known for groundhog day.