St. Patrick's Day is celebrated on March 17th to honor St. Patrick, the patron saint of Ireland. Traditional symbols of the holiday include the shamrock, leprechaun, and Celtic cross. Music and foods like Irish bacon and corned beef are also part of Irish culture. Families often wear green and attend church in the morning before celebrating in the afternoon. Parades have been held since the 1700s, and today the Chicago River is dyed green for celebrations as well. St. Patrick's Day is now commemorated around the world.