Saint Patrick's Day (Irish: Lá Fhéile Pádraig) is a religious holiday on the 17th of March. It is named after Saint Patrick (circa AD 387–461), the most commonly recognised of the patron saints of Ireland. It began as a purely Catholic holiday and became an official feast day in the early 17th century. It has gradually become more of a secular celebration of Ireland's culture.

It is a public holiday in the Republic of Ireland, Northern Ireland and Newfoundland and Labrador

Also called St Patrick's Day
St Paddy's Day
Patrick's Day
Paddy's Day
Patty's Day