St. Patrick's Day (Irish: Lá Fhéile Pádraig, "the Day of the Festival of Patrick"), is a cultural and religious celebration held on March 17, the traditional date when Saint Patrick died. What began as a religious feast day for the patron saint of Ireland (c. AD 385–461) has become an international festival observed by the Irish and the Irish-at-heart. Irish culture is celebrated with parades, dancing, special food, beer and a tremendous amount of green (including copious amounts of green beer).
Symbols have always had a great significance in the lives of humans, from pre-historic times to modern man. Since ancient symbols are ingrained into our lives, most people don't realize these symbols are everywhere. From the logos of modern companies (Starbucks with their mermaid), to television shows (spirals in True Detective) and movies (Legendary Pictures with their Celtic knot logo) from religious books and texts (The Bible, The Koran) to decorations on buildings (sunbursts and dolphins), ancient symbols are everywhere.