St. Patrick’s Day celebrates Ireland’s patron saint, St. Patrick. It was originally celebrated as a Catholic feast day, though it is now a mostly secular holiday in many parts of the world. Today St. Patrick’s day celebrates Irish culture all around the world. In Ireland, many festivities and parades are held, but Ireland encourages celebrations of St. Patrick’s Day all around the world. Many people spend St. Patrick’s Day at parades and at Irish pubs around town. Alcohol is often an important part of any St. Patrick’s Day celebration. Most people wear the color green on St. Patrick’s Day and some cities set up displays with the color green. For instance, the Chicago River is dyed green each year. Another important symbol of St. Patrick’s Day is the Shamrock. Finding a four leaf clover is considered good luck.