3/17 - St. Paddy's Day - A Primer
He wasn't Irish, he was "Romano-British"
He wasn't Catholic, they weren't around yet
He's not officially canonized, either (added on edit)
His real name is unknown, probably not Patrick
(Patrick, fwiw is a corruption of the Irish Pádraig)
Nobody knows precisely where or when he was born, or to whom
Nobody is sure exactly when he died, either
There never were any fookin snakes in Ireland
Other useful information
Saint Pat's Day in the US is amateur hour, a good day to stay safely inside at home and avoid all the fratboys out getting bombed on cheap booze.
True Green Beer:
Green Beer is beer that has undergone its primary fermentation but has yet to undergo a period of conditioning before packaging. It is perhaps “drinkable” but not ready to drink.
St. Pat's Day Green Beer: This is generally Buttwiper or some similar obnoxious beverage dosed with chemical food coloring to turn it green. It is an abomination and no self-respecting Irish person would drink it. (That is also largely true of Buttwiper without food coloring, but that is another matter.)
Saint Patrick, green beer