Available for download What Day Is It?. Saint Patrick's Day, feast day (March 17) of St. Patrick, patron saint of Ireland. Staged the most extensive celebrations, which included elaborate parades. As it falls near the equinox, the day is associated with the beginning of They were the four dates on which servants were hired, rents due or leases begun. Ancient Celts called it Beltaine, which is still celebrated today. Over the centuries, it evolved and took on a more secular nature in Europe, including the addition In Mexico, D