Saint Patrick’s Day, or the Feast of Saint Patrick is a cultural and religious celebration held on 17 March, the traditional death date of Saint Patrick (c. AD 385–461), the foremost patron saint of Ireland. Saint Patrick depicted in a stained glass window at Saint Benin’s Church, Ireland
Saint Patrick’s feast day, as a kind of national day, was already being celebrated by the Irish in Europe in the ninth and tenth centuries. In later times, he became more and more widely seen as the patron of Ireland. Saint Patrick’s feast day was finally placed on the universal liturgical calendar in the Catholic Church due to the influence of Waterford-born Franciscan scholar Luke Wadding in the early 1600s. Saint Patrick’s Day thus became a holy day of obligation for Roman Catholics in Ireland.