16 Mar St. Patrick's Day WHO WAS ST. PATRICK AND WHY DO WE CELEBRATE ST. PATRICK’S DAY? Who was St. Patrick? Why are shamrocks a symbol of this day? Enjoy St. Patrick’s Day history, legend, and lore! WHEN IS ST. PATRICK’S DAY? St. Patrick’s Day... | Tagged THE SHAMROCK, WHO WAS ST. PATRICK, WHY DO WE CELEBRATE ST. PATRICK'S DAY?