성 패트릭 (St. Patrick's Day) is celebrated on March 17th each year, honoring St. Patrick, the patron saint of Ireland. This holiday commemorates his contributions to Christianity in Ireland and his role in converting the Irish people to the faith. Traditionally, people celebrate with parades, wearing green clothing, and enjoying festive foods. Symbols like the shamrock are commonly associated with the holiday, as it is said that St. Patrick used it to explain the concept of the Holy Trinity. Many also enjoy traditional Irish music and dance during the festivities.