Saint Patrick’s Day 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 Roman 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…
More has Wikipedia.
And to my liking:
Christ shield me this day: Christ with me, Christ before me, Christ behind me, Christ in me, Christ beneath me, Christ above me, Christ on my right, Christ on my left, Christ when I lie down, Christ when I arise, Christ in the heart of every person who thinks of me, Christ in the eye that sees me, Christ in the ear that hears me (The Breastplate of St Patrick).
A great prayer!
There is more on St Patrick here. But I’ll end with:
Patrick is famous for using the shamrock, a flower native to Ireland to explain the Trinity to the pagans who did not understand. Just as the shamrock has three leaves but is one flower, so the trinity has three persons but is one God, he said.