Groundhog Day

Groundhog Day
Groundhog Day 2005 in Punxsutawney, Pennsylvania, U.S.
Observed by United States
Type Cultural
Significance Supposedly predicts the arrival of spring
Celebrations Announcing whether a groundhog sees its shadow after it emerges from its burrow
Date February 2
Frequency Annual
Related to Candlemas

Groundhog Day (Pennsylvania German: Grund'sau dåk, Grundsaudaag, Grundsow Dawg, Murmeltiertag; Nova Scotia: Daks Day[1]) 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.[2]

The weather lore was brought from German-speaking areas where the badger (German: dachs) is the forecasting animal. This appears to be an enhanced version of ancient bear lore. Anciently, the bear was worshiped throughout most of the northern hemisphere with the bear being viewed as a controller of the weather. Further, actual bears were seen as living embodiments of the creator/weather deity and as such, bears (& by further extension the badger or groundhog) were viewed as a prophet of the seasons with the bear's reappearance fortelling the return of spring. Ancient Europeans believed that if Father Bear, who had just emerged from his sleep of death, was able to see clear weather (around the Catholic religious day of Candlemas which occurred six weeks after the longest period of darkness, that Father Bear would return to his den for another six weeks of prolonged winter.

The Groundhog Day ceremony held at Punxsutawney in western Pennsylvania, centering around a semi-mythical groundhog named Punxsutawney Phil, has become the most attended. Grundsow Lodges in Pennsylvania Dutch Country in the southeast part of the state celebrate them as well. Other cities in the United States and Canada have also adopted the event.

The 1993 film Groundhog Day helped boost recognition of the custom, and the celebration has spread even further afield. In 2009, Quebec began to mark the day (Canadian French: Jour de la Marmotte) with its own groundhog.


The observance of Groundhog Day in the United States first occurred in German communities in Pennsylvania, according to known records.

The earliest mention of Groundhog Day is a February 2, 1840 entry in the diary of James L. Morris of Morgantown, Pennsylvania, in Pennsylvania Dutch Country, according to the book on the subject by Don Yoder. This was a Welsh enclave but the diarist was commenting on his neighbors who were of German stock.[lower-alpha 1][lower-alpha 2][4][5]

Punxsutawney beginnings

The first reported news of a Groundhog Day observance was arguably made by the Punxsutawney Spirit newspaper of Punxsutawney, Pennsylvania in 1886:[lower-alpha 3] "up to the time of going to press, the beast has not seen its shadow". However, it was not until the following year in 1887 that the first Groundhog Day considered "official" was commemorated here,[6] with a group making a trip to the Gobbler's Knob part of town to consult the groundhog. People have gathered annually at the spot for the event ever since.[7][8]

Clymer Freas (1867–1942)[lower-alpha 4] who was city editor at the Punxsutawney Spirit is credited as the "father" who conceived the idea of "Groundhog Day".[9][lower-alpha 5] It has also been suggested that Punxsutawney was where all the Groundhog Day events originated, from where it spread to other parts of the United States and Canada.[11]

The Groundhog Day celebrations of the 1880s were carried out by the Punxsutawney Elks Lodge. The lodge members were the "genesis" of the Groundhog Club formed later, which continued the Groundhog Day tradition. But the lodge started out being interested in the groundhog as a game animal for food. It had started to serve groundhog at the lodge, and had been organizing a hunting party on a day each year in late summer.[12]

The chronologies given are somewhat inconsistent in the literature. The first "Groundhog Picnic" was held in 1887 according to a book for popular reading by an academic,[9] but given as post-circa-1889 by a local historian in a journal. The historian states that around 1889 the meat was served in the lodge's banquet, and the organized hunt started after that.[12]

Either way, the Punxsutawney Groundhog Club was formed in 1899, and continued the hunt and "Groundhog Feast", which took place annually in September.[13][14] The "hunt" portion of it became increasingly a ritualized formality, because the practical procurement of meat had to occur well ahead of time for marinating. A drink called the “groundhog punch” was also served.[lower-alpha 6][15][16] The flavor has been described as a "cross between pork and chicken".[17] The hunt and feast did not attract enough outside interest, and the practice discontinued.[13]

Punxsutawney today

The largest Groundhog Day celebration is held in Punxsutawney, Pennsylvania, where crowds as large as 40,000 gather each year[18] (nearly eight times the year-round population of the town).[19] The average draw had been about 2,000 until the year after the movie screened in 1993, after which attendance rose to about 10,000.[13] The official Phil is pretended to be a supercentenarian, having been the same forecasting beast since 1887.[13]

Other locations

The Slumbering Groundhog Lodge, which was formed in 1907, has carried out the ceremonies that take place in Quarryville, Pennsylvania.[20] It used to be a contending rival to Punxsutawney over the Groundhog Day fame. It employs a taxidermic specimen (stuffed woodchuck).[13]

In southeastern Pennsylvania, Groundhog Lodges (Grundsow Lodges) celebrate the holiday with fersommlinge,[21] social events in which food is served, speeches are made, and one or more g'spiel (plays or skits) are performed for entertainment. The Pennsylvania German dialect is the only language spoken at the event, and those who speak English pay a penalty, usually in the form of a nickel, dime, or quarter per word spoken, with the money put into a bowl in the center of the table.[22]

Staten Island Chuck is the official weather-forecasting woodchuck for New York City.[23] Dunkirk Dave (a stage name for numerous groundhogs that have filled the role since 1960) is the local groundhog for Western New York, handled by Bob Will, a typewriter repairman who runs a rescue shelter for groundhogs.[24][25]

In Washington, DC, the Dupont Circle Groundhog Day event features Potomac Phil, another taxidermic specimen. In addition to the spring prediction, if Potomac Phil sees its shadow, it portents six more months of political gridlock.

In the American South, the General Beauregard Lee of Lilburn, Georgia is known to have the most accurate prediction, standing at 94%. The University of Dallas in Irving, Texas has boasted of hosting the second largest Groundhog celebration in the world.[26]

The day is observed with various ceremonies at other locations in North America beyond the United States,[27] including Wiarton Willie of Wiarton, Ontario,[28] and Shubenacadie Sam in Nova Scotia which, due to Nova Scotia's Atlantic Time Zone, makes the first Groundhog Day prediction in North America.[29] "Daks Day" (from the German dachs) is Groundhog Day in the dialect of Lunenburg, Nova Scotia.[1]

In French Canada, Fred la marmotte of Val-d'Espoir[30][31] has been the representative forecaster for the province of Quebec since 2009.[32][31] A study also shows that in Quebec, the marmot or groundhog (siffleux) are regarded as Candlemas weather-predicting beasts in some scattered spots, but the bear is the more usual animal.[33][lower-alpha 7]

In 2017 Groundhog Day was scheduled to be observed at zoos in Moscow, St. Petersburg, and Samara, Russia.[36]


The Pennsylvania Dutch were immigrants from German-speaking areas of Europe. The Germans already had a tradition of marking Candlemas (February 2) as "Badger Day" (Dachstag), where if a badger emerging found it to be a sunny day thereby casting a shadow, it foreboded the prolonging of winter by four more weeks.

Protestant Germany

The Candlemas was a Catholic festival officially eliminated by the Protestant Reformers, but it had been retained and continued to be celebrated by the folk.[37]

The weather-predicting animal on Candlemas was usually the badger, although regionally the animal was the bear or the fox.[38] The original weather-predicting animal in Germany had been the bear, another hibernating mammal, but when they grew scarce the lore became altered.[39]

Similarity to the groundhog lore has been noted for the German formula "Sonnt sich der Dachs in der Lichtmeßwoche, so geht er auf vier Wochen wieder zu Loche" (If the badger sunbathes during Candlemas-week, for four more weeks he will be back in his hole).[lower-alpha 8][40] A slight variant is found in a collection of weather lore (bauernregeln, lit. "farmers' rules") printed in Austria in 1823.[41]

Groundhog as badger

So the same tradition as the Germans, except that winter's spell would be prolonged for six weeks instead of four, was maintained by the Pennsylvanians on Groundhog Day.[42] In Germany, the animal was dachs or badger. For the Pennsylvania Dutch, it became the dox which in Deitsch referred to "groundhog".[lower-alpha 9][3][43]

The standard term for "groundhog" was grun′daks (from German dachs), with the regional variant in York County being grundsau, a direct translation of the English name, according to a 19th-century book on the dialect.[44] The form was a regional variant according to one 19th century source.[44] However, the weather superstition that begins "Der zwet Hær′ning is Grund′sau dåk. Wânn di grundau îr schâtte sent... ("February second is Groundhog day. If the groundhog sees its shadow...)" is given as common to all 14 counties in Dutch Pennsylvania Country, in a 1915 monograph.[lower-alpha 10][45] The form grundsow has been used by the lodge in Allentown and elsewhere.[46]


The groundhog was once also known by the obsolete Latin alias Arctomys monax. The genus name signified "bear-rat".[35][47] The European marmot is of the same genus and was formerly called Arctomys alpinus. It was speculated that the European counterpart might have lore similar to the groundhog attached to it.[35][lower-alpha 11]

Simpler Candlemas lore

The German version, with the introduction of the badger (or other beasts) was an expansion on a more simple tradition that if the weather was sunny and clear on Candlemas Day people expected winter to continue.[42] The simpler version is summarized in the English (Scots dialect) couplet that runs "If Candlemas is fair and clear / There'll be twa winters in the year",[lower-alpha 12][lower-alpha 13] with equivalent phrases in French and German.[34] And the existence of a corresponding Latin couplet has been suggested as evidence of the great antiquity of this tradition.[lower-alpha 14][34]

In fact, the Christian Candlemas itself was an assimilation of the Roman rite for the goddess Februa with a procession on February 2, to honor her, according to Yoder. The Roman calendar, in turn, had Celtic origins. Candlemas concurs with Imbolc, one of the Celtic ‘cross-quarter days’, the four days which marked the midpoints between solstice and equinox.[48][4]

British and Gaelic calendars

Scholar Rhys Carpenter in 1946 emphasized that the Badger Day tradition was strong in Germany, but absent in the British Isles (England, Scotland, Wales, or Ireland), and he referred to this as a reason that the U.S. Groundhog Day was not brought by immigrants from these places.[49]

There did exist a belief among Roman Catholics in Britain that the hedgehog predicted the length of winter, or so it has been claimed, but without demonstration of its age, in a publication by the Scotland-born American journalist Thomas C. MacMillan in 1886,[34] and American writer/journalist Samuel Adams Drake's book published in 1900.[50][lower-alpha 15]

In the Gaelic calendar of Ireland, Scotland and the Isle of Man, Brigid's Day (February 1) is a day for predicting the weather.[51][52] While in Scotland the animal that heralds spring on this day is a snake,[53] and on the Isle of Man a large bird,[54] in Ireland folklorist Kevin Danaher records lore of hedgehogs being observed for this omen:

In Irish folk tradition St. Brighid's Day, 1 February, is the first day of Spring, and thus of the farmer's year. ... To see a hedgehog was a good weather sign, for the hedgehog comes come out of the hole in which he has spent the winter, looks about to judge the weather, and returns to his burrow if bad weather is going to continue. If he stays out, it means that he knows the mild weather is coming.[51]


In Pennsylvania, Punxsutawney Phil has become a popular tradition. On February 2, people within the city will gather to find out whether or not Phil’s shadow is revealed. With that, he will allegedly determine whether spring will soon begin by not seeing his shadow, or if winter will ensue for six more weeks.


Punxsutawney Phil's statistics are kept by the Pennsylvania’s Groundhog Club which cares for the animal. Phil has predicted 103 forecasts for winter and just 17 for an early spring.[55] Most assessments of Phil's accuracy have given accuracy lower than would be expected with random chance, with Stormfax Almanac giving an estimate of 39%,[56] and meteorologist Tim Roche of Weather Underground giving a 36% accuracy rate between 1969 and 2016 (a range chosen because local weather data was most reliable from 1969 onward) and a 47% record in that time span when predicting early spring.[55] Other poor results from analysis are reported by the Farmer's Almanac (which itself has been known for forecasts of questionable accuracy) as "exactly 50 percent" accuracy,[57] and The National Geographic Society reporting only 28% success.[58] But a Middlebury College team found that a long-term analysis of temperature high/low predictions were 70% accurate, although when the groundhog predicted early spring it was usually wrong.[59] Canadian meteorologist Cindy Day has estimated that Nova Scotia's "Shubenacadie Sam" has an accuracy rate of about 45% compared to 25% for Wiarton Willy in Ontario.[60]

Part of the problem with pinning down an accuracy rate for the groundhog is that what constitutes an early spring is not clearly defined. Other groundhogs such as Staten Island Chuck do use an objective formula (in Chuck's case, a majority of days that reach 40 °F (4 °C) in New York City between Groundhog Day and the March equinox) to assess accuracy.[61]

Pseudoscientific evaluation

Prediction based on an animal’s behavior used to be given more credence in the past when stores of food became scarce as winter progressed.[62]

One theory states that the groundhog naturally comes out of hibernation in central Pennsylvania in early February because of the increasing average temperature. Under this theory, if German settlement had been centered further north, Groundhog Day would take place at a later date.[63] However, the observed behavior of groundhogs in central New Jersey was that they mostly come out of their burrows in mid-March, regardless of Groundhog Day weather.[64]

Characteristics of groundhogs

Groundhogs are creatures within the rodent family that weigh between 12 and 15 pounds and can live up to 8 years.[65] These animals are omnivores, but commonly feast on grass, vegetables, and fruit. Groundhogs have the ability to climb trees and, much like beavers, swim. Each fall, groundhogs go into hibernation until March. When the animals emerge from hibernation, their initial purpose is to find a mate.

Similar customs

In Croatia and Serbia, Orthodox Christians have a tradition that on February 2 (Candlemas) or February 15 (Sretenje, The Meeting of the Lord), the bear will awaken from winter dormancy, and if it sees (meets) its own shadow in this sleepy and confused state, it will get scared and go back to sleep for an additional 40 days, thus prolonging the winter. Thus, if it is sunny on Sretenje, it is a sign that the winter is not over yet. If it is cloudy, it is a good sign that the winter is about to end.[66]

Similarly in Germany, on the 27th of June, they recognize the Seven Sleepers' Day (Siebenschläfertag). If it rains that day, the rest of summer is supposedly going to be rainy. As well, in the United Kingdom, the 15th of July is known as St. Swithin's day.[67] It was traditionally believed that, if it rained on that day, it would rain for the next 40 days and nights.[67]

Explanatory notes

  1. February 2, 1840 read: "Today the Germans say the groundhog comes out of his winter quarters and if he sees his shadow he returns in and remains there 40 days."
  2. Some sources stated that Morris's February 4, 1841 entry was the oldest. It read: "Last Tuesday, the 2nd, was Candlemas day, the day on which, according to the Germans, the Groundhog peeps out of his winter quarters and if he sees his shadow he pops back for another six weeks nap, but if the day be cloudy he remains out, as the weather is to be moderate."[3]
  3. Some books attribute this positively to Clymer Freas.
  4. Also styled H. C. Freas, H. Clymer Freas, or Clymer H. Freas
  5. Other contemporaries of Freas (his colleagues at the paper and fellow-members of the club, etc.) have been given credit for the promotion of Groundhog Day: W. O. Smith, another editor of the paper and later elected to U. S. Congress, cartoonist C. M. Payne, and John P. Cowan of the Pittsburgh Gazette.[10]
  6. a combination of vodka, milk, eggs and orange juice, among many other ingredients.
  7. There were beliefs in Switzerland and France that the marmot predicted the weather, according to MacMillan.[34] "S. S. R." also speculated there might be similar lore for the European marmot, Arctomys alpinus.[35]
  8. Noted by Uwe Johnson; the formula was printed in the Voß un Haas "Fox and Hare" calendars of Mecklenburg.
  9. "Of course everybody knows that February 2 is groundhog day. If the dox (the dialect word for groundhog) sees its shadow on this day, the belief is that six weeks of bad weather will follow".
  10. The letter "â" is actually "a with circumflex below".
  11. Signed "S. S. R." of Lancaster, Pennsylvania. Note that S. S. Rathvon wrote the editorial "The Ground-Hog" and "More of the Ground-hogs" where he refers to the creature as "Old Arctomyx" in the editorial in the March 1884 issue of the Lancaster Farmer XV:3.
  12. A couplet the same as this except "two winters" in standard English is given in Davis (1985), p. 103, alongside two other variants.
  13. "Second Winter"[8] appears to be a neologism that paraphrases "two winters".
  14. "Si Sol splenescat Maria purificante / Major erit glacies post festum quam fuit ante". Note that Maria purificante or The Purification of the Blessed Virgin Mary is the reference to Candlemas day, since this is the biblical event that Candlemas is supposed to commemorate.[4]
  15. Drake also states that the German lore about the badger predicting the winter's duration was firmly accepted in New England. The groundhog, badger/bear, and hedgehog are all noted as paralleling each other.


  1. 1 2 Poteet, Lewis J. (2004) [1988], The South Shore Phrase Book (New, revised, and expanded ed.), Hantsport: Lancelot Press
  3. 1 2 Shoemaker, Alfred L. (February 1, 1954), February Lore, 5 (11) (download)
  4. 1 2 3 Kruesi, Margaret (Summer 2007). "Reviewed Work: Groundhog Day by Don Yoder". Journal of American Folklore. 120 (477): 367–368. JSTOR 20487565
  5. Yoder (2003), pp. 49, 54, 143, diary printed in "Folklore from the Diary of James L. Morris, 1845–1646", Pennsylvania Dutchman 3:17 (February 1, 1952)"
  6. Davis (1985), p. 110.
  7. Davis (1985), p. 109.
  8. 1 2 "This Is the Story Behind Groundhog Day". Time. Retrieved December 21, 2017.
  9. 1 2 Yoder (2003), p. 10.
  10. Davis (1985).
  11. Yoder (2003), Chapter II, "Punxsutawney to the World"
  12. 1 2 Davis (1985), p. 106.
  13. 1 2 3 4 5 Carlson, Peter (February 3, 2004). "His Moment In the Sun". The Washington Post. 23.
  14. Yoder (2003), p. 11.
  15. Davis (1985), p. 107.
  16. "The Original Groundhog Day Involved Eating the Groundhog". Time. Retrieved December 21, 2017.
  17. Pittsburgh Gazette, September 27, 1903, cited by Davis (1985), p. 106, note 12.
  18. Park, PhD, David (February 2, 2006). "Happy Groundhog Day to You!". Archived from the original on February 5, 2009. Retrieved February 5, 2009.
  19. Yoder (2003), p. 9.
  20. Davis (1985), p. 105.
  21. Yoder (2003), p. xii.
  22. Rosenberger, Homer Tope (1966). The Pennsylvania Germans: 1891–1965. Lancaster, PA: Pennsylvania German Society. pp. 194–199. OCLC 1745108.
  23. Rosenberg, Eli (February 2, 2016). "Staten Island Groundhog Makes Star Turn, This Year Without de Blasio". N.Y./Region. New York, New York: The New York Times. Archived from the original on February 14, 2016. Retrieved February 14, 2016.
  24. "Punxsutawney Phil and seven other famous groundhogs you should know". Fox News. February 2, 2018. Retrieved February 2, 2018.
  25. Kirst, Sean (February 2, 2018). "Sean Kirst: For Dunkirk Dave's caretaker, every day is Groundhog Day". The Buffalo News. Retrieved February 1, 2018.
  26. Colleges in the Midwest: Compare Colleges in Your Region (24 ed.). Peterson's. 2009. p. 298. ISBN 9780768926903. Retrieved February 1, 2013.
  27. Yoder (2003), p. 33.
  28. "Hopeful Canadians look to Groundhog Day for predictions of an early spring". Canadian Press. February 2, 2014. Retrieved February 20, 2014.
  29. "Shubenacadie Sam prepping for Groundhog Day". King's County Register. January 30, 2014. Retrieved February 20, 2014.
  30. "Groundhog Day: Quebec groundhog disagrees with Shubenacadie Sam, Wiarton Willie". The Gazette. Montreal, CA. February 2, 2012. Archived from the original on February 2, 2012.
  31. 1 2 "Le jour de la marmotte, science ou folklore?". Radio-Canada. February 2, 2017. Retrieved December 26, 2015.
  32. "Fred la marmotte : encore six semaines d'hiver!". Radio-Canada. February 2, 2015. Retrieved February 2, 2015. la marmotte officielle du Québec
  33. Rodrigue, Denise (1983). Le cycle de Pâques au Québec et dans l'Ouest de la France. Presses Université Laval. pp. 34, 36. ISBN 9782763769035.
  34. 1 2 3 4 MacMillan, Thomas C., ed. (1886). Ground-Hog Day ― Candlemas. The Inter Ocean Curiosity Shop for the year 1885 (3 ed.). Chicago: The Inter Ocean Publishing Company. pp. 68–69.
  35. 1 2 3 S.S.R. (February 15, 1890), "Arctomyx monax", American Notes and Queries, 4: 188
  36. "Groundhog Day 2017: Furry Forecasters Around the World". February 2, 2017. Retrieved February 2, 2017.
  37. Yoder (2003), p. 42.
  38. Yoder (2003), pp. 52–53.
  39. Yoder (2003), p. 54.
  40. Uwe Johnson, cited by Grambow, Jürgen (1994), "Möglichkeiten einer intellektuellen Kritik an diesem Mecklenburg", Johnson-Jahrbuch, Vandenhoeck & Ruprecht, 1, p. 77
  41. Lewenau, Joseph Arnold Ritter von (1823), Der angewandte Fresenius; oder, Sammlung geordneter allgemeiner Witterungs- und sogenannter Bauernregeln, Vienna, J.G. Mösle, p. 20: "Wenn sich der Dachs zu Lichtmeß sonnt, so gehet er wieder auf vier Wochen in sein Loch. (If the badger is in the sun at Candlemas, he will have to go back into his hole for another four weeks)"
  42. 1 2 Yoder (2003), p. 52.
  43. dachs is glossed as meaning "raccoon, groundhog, or short-legged dog" in : Lambert, Marcus Bachman (1924), "Pennsylvania-German Dictionary", Pennsylvania-German Society: 35
  44. 1 2 Haldeman, Samuel Stehman (1872), Pennsylvania Dutch: A Dialect of South German with an Infusion of English, Reformed Church Publication Board, pp. 5–6
  45. Fogel, Edwin Miller (1915). Beliefs and Superstitions of the Pennsylvania Germans. 18. Philadelphia: American Germanica Press. p. 236.
  46. Yoder (2003), pp. 67, 76.
  47. Yoder (2003), pp. 54–57.
  48. Yoder (2003), pp. 52, 42–43.
  49. Yoder (2003), p. 53.
  50. Drake, Samuel Adams (1900). The Myths and Fables of To-day. Frank T. Merill (illustr.). Boston: Lee and Shepard. pp. 43–44.
  51. 1 2 Danaher, Kevin (1972), The Year in Ireland, Cork: Mercier, p. 13-14, ISBN 1-85635-093-2, In Irish folk tradition St. Brighid's Day, 1 February, is the first day of Spring, and thus of the farmer's year. ... To see a hedgehog was a good weather sign, for the hedgehog comes come out of the hole in which he has spent the winter, looks about to judge the weather, and returns to his burrow if bad weather is going to continue. If he stays out, it means that he knows the mild weather is coming.
  52. Minard, Antone (2012), "Imbolc", The Celts, ABC-CLIO, 1, p. 444, ISBN 978-1-5988-4964-6
  53. {{Verse translation|Thig an nathair as an toll / Là donn Brìde, / Ged robh trì troighean dhen t-sneachd / Air leac an làir. |The serpent will come from the hole / On the brown Day of Bríde, / Though there should be three feet of snow / On the flat surface of the ground. -- Carmichael, Alexander (1900) Carmina Gadelica: Hymns and Incantations, Ortha Nan Gaidheal, Volume I, p. 169 The Sacred Texts Archive
  54. Briggs, Katharine (1976) An Encyclopedia of Fairies. New York, Pantheon Books. pp. 57-60. "On the Isle of Man, where She is known as Caillagh ny Groamagh, the Cailleach is said to have been seen on St. Bride's day in the form of a gigantic bird, carrying sticks in her beak."
  55. 1 2 "How Accurate Are Punxsutawney Phil's Groundhog Day Forecasts?". Live Science. Retrieved December 21, 2017.
  56. Stormfax. "Groundhog Day History from Stormfax® 2016". Retrieved 2016-02-18.
  57. Thomas, R. B. (1998), The Farmer's Almanac, p. 67, cited in Aaron et al. (2001), p. 28
  58. Allison, Christine (1995), 365 days of gardening, p. 353, cited in Aaron et al. (2001), p. 28
  59. Aaron, Michael A.; Boyd, Brewster B., Jr.; Curtis, Melanie J.; Sommers, Paul M. (January 2001), "Punxsutawney's Phenomenal Phorecaster", The College Mathematics Journal, 32 (1): 26–29, doi:10.2307/2687216, JSTOR 2687216.
  60. Tom Ayers, "Shubenacadie Sam unlikely to see his shadow", Chronicle Herald, January 31, 2018a
  61. Groundhog Day 2017: Staten Island Chuck calls for an early spring
  62. Lewis, Danny. "A Short History of Groundhog Day". Smithsonian. Retrieved December 21, 2017.
  63. Coin, Glenn (February 1, 2015). Groundhog Day 2016: Do you trust a rodent to predict the weather? Syracuse Post-Standard. Retrieved February 1, 2016.
  64. "Happy Groundhog Day...again?". Retrieved October 31, 2017.
  65. "First Groundhog Day — Feb 02, 1887 -". Retrieved December 21, 2017.
  66. Lodge, Olive (1942), Peasant Life in Yugoslavia, Ams Press Inc, p. 142
  67. 1 2 Keever, Homer M. (1976), Iredell, Piedmont County, Iredell County Bicentennial Commission, p. 26

Further reading

  • Old, W. C., and P. Billin-Frye (2004). The Groundhog Day Book of Facts and Fun. Morton Grove, IL: Albert Whitman.
  • Pulling, A. F. (2001). Around Punxsutawney. Charleston, S.C.: Arcadia.
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