About.com: What the Heck is Groundhog Day Anyway?: Includes a brief history of Groundhog Day and links to famous groundhogs, plus photos, FAQ, and event listings for the celebration in Punxsutawney, Pennsylvania.
Frumious Bandersnatch Satirical Newspaper and Ezine: "Groundhog buried alive; Phoenix faces 12 years of summer!" Satire about Punxsutawney Phil.
Groundhog Day: The history of how Groundhog Day started and what it means.
Groundhog Day: A short introduction to the most-watched weather forecast of the year-and the only one led by a rodent.
Groundhog Day: Background of Groundhog day along with trivia, songs, and groundhog wallpaper.
Groundhog Day and Chinese Astronomy: Explanation of relationship between Groundhog Day and Chinese Astronomy.
Groundhog Day History: Groundhog Day history from Stormfax, with folklore and winter weather lore.
Groundhog Day in Wiarton: Short description of the holiday, along with the latest weather information from the home of Wiarton Willie.
Groundhog Day Links: Over 100 links to Groundhog Day related websites.
Groundhog Day-NOBLE: Collection of Groundhog Day links from NOBLE: the North of Boston Library Exchange.
Groundhog.Org: Official site of the Punxsutawney, Pennsylvania, Groundhog Club. Includes detailed history of the day, a listing of local events, and printable activity pages for kids.
Groundhogs at HogHaven: Groundhog photographs, sounds, animation, information, postcards, and screen saver.
PunxsutawneyPhil.com: A tribute site to the world's most famous weather-forecasting groundhog.
Reasons to Celebrate Groundhog Day: Humorous top 10 list.
The Official Website of Spanish Joe: Prognosticating groundhog in Spanish, Ontario, Canada. Predictions, products and services, news articles, photos, and groundhog facts.
Wiarton Willie: Home page of Canadian weather groundhog, Wiarton Willie.
Wiarton Willie and Groundhog Day: Includes reports, quick facts, and related links.
Wikipedia: Open-content encyclopedia article covering the history of the holiday.