St. Patrick's Day Celebration Description Description Saint Patrick's Day, or the Feast of Saint Patrick, is a religious celebration held on 17 March, the traditional death date of Saint Patrick, the foremost patron saint of Ireland. Wikipedia Date: Wednesday, 17 March 2021 Significance: Feast day of Saint Patrick, commemoration of the arrival of Christianity in Ireland Observances: Attending mass or service Symbol: Shamrock Also called: Feast of Saint Patrick, Lá Fhéile Pádraig, Patrick's Day, MORE