Saint Patrick's Day
From Wikipedia, the free encyclopedia

Saint Patrick's Day or the Feast of Saint Patrick is a cultural and religious holiday celebrated on 17 March. It commemorates Saint Patrick (c. AD 387–461), the most commonly recognised of the patron saints of Ireland, and the arrival of Christianity in Ireland. Saint Patrick's Day was made an official feast day in the early seventeenth century, and has gradually become a celebration of Irish culture in general.
 

The day is generally characterised by the attendance of church services, wearing of green attire  and public parades and processions.

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 Great Britain, Canada, the United States, Argentina, Australia, and New Zealand, among others. Today, St. Patrick's Day is probably the most widely celebrated saint's day in the world.