Saint Patrick’s Day is celebrated worldwide in more than 200 countries. It is a national holiday in the Republic of Ireland, Northern Ireland, the Canadian province of Newfoundland and Labrador, and the British overseas territory, Montserrat - both of which have inhabitants with Irish descent. And there's more to this holiday than just an excuse to drink pints of Guinness... We put together a handy guide to everything you didn't know about about the patron saint of Ireland.
