The Feast of St. Patrick is celebrated by the Roman Catholic Church, the U.S.Episcopal Church, as a commemoration by the Evangelical Lutherans, and venerated in Orthodox Church. It is a public holiday in Ireland. The shamrock was used by St.Patrick to explain the Holy Trinity. In Ireland it is celebrated by families getting together for a meal. If the day falls on a Friday during Lent, observant Catholics receive dispensation to eat meat. If the feast day falls during Holy Week (and it does occasionally), the feast day is moved to avoid conflicting with the Holy Week calendar. A more recent occurrence are public festivals in Ireland and use of the day to promote Irish culture.