LONDON - MARCH 16: A man poses with Irish beer during St Patrick's Day celebrations March 16, 2003 in London. London celebrated Ireland's national day with a parade from Hyde Park Corner to Victoria Embankment and a festival along the Southbank. St Patrick's Day is officially March 17. (Photo by Scott Barbour/Getty Images)

You wear green and drink beer. But believe it or not, there is more to St. Patrick’s Day than just bar crawls and leprechauns. Was green always associated with the holiday? What does the holiday mark? How much do you know about St. Patrick’s Day? Take our quiz to find out!