St. Patrick’s Day fast food deals are bigger than ever. From free Krispy Kreme doughnuts to mint shakes, here’s why chains keep going all-in on the holiday

Krispy Kreme launched four new flavors for St. Patrick's Day. Here's how to get a free glazed by wearing green and how to win free doughnuts for a year/

St. Patrick is the patron saint of Ireland, according to the History Channel. He was kidnapped from Roman Britain and brought to Ireland as a slave at the age of 16, before escaping and returning to Ireland.