A day about a man in history who was a slave in Ireland, who then escaped, became a Catholic Priest, Drove snakes out of Irelands and in some lesser accounts fought Magick wielders.
According to http://www.st-patricks-day.com/ "Beannachtaí na Féile Pádraig is the Gaelic way of expressing a wish that you have all the blessings of St Patrick's Day and the "luck of the Irish" to go with it."
So why is drinking and feasting a part of this Religious Holiday?
"It became a feast day in the Roman Catholic Church due to the influence of the Waterford-born Franciscan scholar Luke Wadding in the early part of the 17th century, and is a holy day of obligation for Roman Catholics in Ireland." - http://en.wikipedia.org/wiki/Saint_Patrick%27s_Day
In any case, Have fun, be safe, and be Green! :-)
But even as I may drink my self Irish tonight; I will still raise a glass to the Japanese, in hopes that Good Luck spreads to their land in such troubled times!
R. William Holzkopf Jr.