Groundhog Day is not a public holiday. Businesses have normal opening hours.
Falling midway between the winter solstice and the spring equinox, February 2 is a significant day in several ancient and modern traditions. The Celts, for instance, celebrated it as Imbolc, a pagan festival marking the beginning of spring.
As Christianity spread through Europe, Imbolc evolved into Candlemas, a feast commemorating the presentation of Jesus at the holy temple in Jerusalem. In certain parts of Europe, Christians believed that a sunny Candlemas meant another 40 days of cold and snow.
Germans developed their own take on the legend, pronouncing the day sunny only if badgers and other small animals glimpsed their own shadows. When German immigrants settled Pennsylvania in the 18th and 19th centuries, they brought the custom with them, choosing the native groundhog as the annual forecaster.