Happy St. Patricks Day!

The Chicago River dyed green  for the St Patrick's Day celebration, shown here in 2005.

To all the Irish people out there and everybody else, Happy St. Patricks day! Do you know the reason why this day is celebrated? If you don't, read on.

Saint Patrick's Day (Irish: Lá Fhéile Pádraig) is a religious holiday celebrated internationally on 17 March. It is named after Saint Patrick (c. AD 387–461), the most commonly recognised of the patron saints of Ireland. It is observed by the Catholic Church, the Anglican Communion (especially the Church of Ireland), the Eastern Orthodox Church and Lutherans. Saint Patrick's Day was made an official feast day in the early 17th century, and has gradually become a celebration of Irish culture in general.

The day is generally characterized by the attendance of church services, wearing of green attire (especially shamrocks), and the lifting of Lenten restrictions on fasting and drinking, which is often proscribed during the rest of the season.

Saint Patrick's Day is a public holiday in the Republic of Ireland, Northern Ireland, Newfoundland and Labrador and in Montserrat. It is also widely celebrated by the Irish Diaspora, especially in places such as the Great Britain, Canada, the United States, Argentina, Australia, and New Zealand, among others.

Saint Patrick (c. 387–461)

Little is known of Patrick's early life, though it is known that he was born in Roman Britain in the 4th century, into a wealthy Romano-British family. His father and grandfather were deacons in the Church. At the age of sixteen, he was kidnapped by Irish raiders and taken captive to Ireland as a slave. It is believed he was held somewhere on the west coast of Ireland, possibly Mayo, but the exact location is unknown. According to his Confession, he was told by God in a dream to flee from captivity to the coast, where he would board a ship and return to Britain. Upon returning, he quickly joined the Church in Auxerre in Gaul and studied to be a priest.

In 432, he again said that he was called back to Ireland, though as a bishop, to Christianise the Irish from their native polytheism. Irish folklore tells that one of his teaching methods included using the shamrock to explain the Christian doctrine of the Trinity to the Irish people. After nearly thirty years of evangelism, he died on 17 March 461, and according to tradition, was buried at Downpatrick. Although there were other more successful missions to Ireland from Rome, Patrick endured as the principal champion of Irish Christianity and is held in esteem in the Irish Church.