There is no particular reason. Patrick (Maewyn Succat) just happened to be in the wrong place at the time Irish raders paid a visit to his town in Britain.
He was captured by Druid pirates from Ireland.
He was captured sometime between the years 402 and 405.
In his own autobiography Patrick tells us that her was 16 years old when he was captured and taken as a slave to Ireland.
He was 16 years old when captured by pirates from Roman Britain and taken to Ireland.
He was sold as a slave to an Irish chieftan.
Pirates from Ireland captured him when he was 16 years old.
I've read that ST Patrick was captured by "pirates" and sold as a slave in Ireland.
Irish raiders who came to his home and captured him to sell as a slave.
he was captured by pirates and they all fled to Ireland
Saint Patrick was a shepherd when he was captured and enslaved in Ireland. He spent his time tending to his owner's sheep while in captivity.
Patrick was sold in Ireland by his Irish Pirate kidnappers as a servant (or slave.)He tended sheep in Ireland for the years of his captivity.
You have it backwards. Saint Patrick's Day was named after Saint Patrick. March 15 is the Catholic feast day of Saint Patrick.