Saint patrick day is coming up!!! St Patrick's Day celebrations have been greatly influenced by those that developed among the Irish diaspora, especially in North America. Until the late 20th century, St Patrick's Day was often a bigger celebration among the diaspora than it was in Ireland. Saint patrick days began as a religious feast day in the 17th century has evolved into a variety of festivals across the globe celebrating Irish culture with parades, special foods, music, dancing, and a whole lot of green.