Groundhog Day is a holiday celebrated in United States and Canada on February 2. In weather lore, if a groundhog, also known as a woodchuck, marmot, or ground squirrel, emerges from its burrow on this day and fails to see its shadow because the weather is cloudy, winter will soon end. If the groundhog sees its shadow, it will return into its burrow and winter will continue for 6 more weeks. Candlemas is usually the same day, and has similar beliefs about the coming weather. Since the release of the film of the same name, it has come to be used in English[citation needed] to mean 'the same thing over and over again' particularly in reference to unpleasant repeating cycles.
Perhaps the earliest known American reference to Groundhog Day can be found at the Historical Society of Berks County in Reading, Pennsylvania. The reference was made February 4, 1841 in Morgantown, Berks County, Pennsylvania storekeeper James Morris' diary: "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." (Lore has it that the groundhog is a timid creature, and the sight of his own shadow will scare him.)
As the light grows longer
The cold grows stronger
If Candlemas be fair and bright
Winter will have another flight
If Candlemas be cloud and snow
Winter will be gone and not come again
A farmer should on Candlemas day
Have half his corn and half his hay
On Candlemas day if thorns hang a drop
You can be sure of a good pea crop