From Wikipedia, the free encyclopedia.
Groundhog Day is a festival celebrated in the USA and Canada on February 2.
The groundhog tradition stems from similar beliefs associated with Candlemas Day[. Though the date is often referred to as one of the four quarter days of the year (the midpoints between the spring and fall equinoxes and the summer and winter solstice), it is in fact one of the Cross-quarter days. 
Tradition states that one must observe a groundhog's burrow on this day. If the groundhog emerges and fails to see its shadow because the weather is cloudy, winter will soon end; however, if the groundhog sees its shadow because the weather is bright and clear, it will be frightened and run back into its hole, and the winter will continue for six more weeks. Certain small towns have well-known meteorological groundhogs, such as Punxsutawney Phil (made famous by the Groundhog Day movie) and Wiarton Willie. Recently Shubenacadie Sam was introduced in Nova Scotia.
The U.S. tradition derived from a Scottish couplet:
- If Candlemas Day is bright and clear,
- there'll be two winters in the year.
- 2004 - Phil, 6 more weeks; Willie, 6 more weeks; Sam early spring
- History of Groundhog Day
- Official site of the Punxsutawney, Penn., Groundhog Club. Also includes detailed history of the day.
- Humorous Top 10 Reasons to Celebrate Groundhog Day
- Google directory
- Groundhog Day songs to popular tunes
For the romantic comedy movie called Groundhog Day see: Groundhog Day (movie)