Groundhog Day[groundˈhôgˌ, -hŏgˌ]
Used by arrangement with John Wiley & Sons, Inc.
groundhog day - Cultural Definition
February 2. According to the legend of Groundhog Day, if a groundhog (a woodchuck) comes out of his hole on that day and sees his shadow, six more weeks of winter will follow. If no shadow appears, there will be an early spring.