The religious holiday known as St. Patrick’s Day falls on Saturday March 15th this year. It was changed by the Roman Catholic Church to avoid conflict with Holy Monday that falls this year on it’s normal date of March 17th. Of course it’s perfectly in order to celebrate it on March 14, 15, 16, and 17 if you have enough beer, friends, and relatives that like to party, or intend going to the Brier.

Here’s a video primer for some background on St Patrick.