groundhog day

Wear corduroy and go bowling - no, really, these are the traditions of Groundhog Day as celebrated in many mid-western American towns and cities. Both corduroy pants and shirts are acceptable. Bowling is also highly encouraged on this day, though the origins of the traditions are obscure, like most holidays celebrated in many mid-western American towns and cities.
Ideally, one will spend the evening if not the entirety of the day of the groundhog in a bowling alley, drinking some kind of beer and wearing corduroy. It is amusing to bowl while wearing corduroy pants and a 10-pin handicap is allowed.
Groundhog Day, featuring Bill Murray, is also a very funny film. My favorite trivial information about this is that it was filmed not in Pennsylvania but in Woodstock, Illinois, fairly close to Chicago. You can see the mansion where the bed and breakfast was located as well as the town square and the church that Bill Murray jumps from to kill himself on one particular day.