The history of St. Paddy’s day as an official holiday dates back to to 1900’s although it was celebrated as a national feast day in Ireland as early as the 10th century. St. Patrick, the most famous patron saint of Ireland, is regarded as the principal missionary in bringing Christianity to Ireland, where he used the leaves of the shamrock to teach the doctrine of the holy trinity.
St. Patrick’s has since spread to all corners of the world. It is widely popular in Canada, USA, Great Britain, Australia and New Zealand, and is even celebrated in Japan and South Korea.
St Patrick is known to have chased the snakes out of Ireland, to this day there are no snakes in Ireland.