Friends - St. Patrick wasn't Irish? I found these lesser-known facts about St. Patrick very interesting. Thought you might, too. #9 made us laugh. Slavery was what brought St. Patrick to Ireland. St. Patrick used the shamrock to explain the Holy Trinity while preaching. A fourth leaf is where we get luck. St. Patrick wore blue, not green. St. Patrick probably didn't drive all the snakes out of Ireland. St. Patrick's wasn’t his given name. St Patrick's Day is held on the day he passed away. St. Patrick isn't technically a saint. The tradition of drinking to celebrate St. Patrick's Day is said to have started with the saint himself, who announced that everybody should have a drop of the hard stuff after an innkeeper was less than forthcoming with a bottle of whiskey.