“If you’re seeing a lot of emerald green around you today you’re not seeing things – it’s just St Patrick’s Day!

:The annual occasion is celebrated all around with world with parades, shamrocks and — in the case of Chicago — by turning an entire river bright green.

“Here’s what you need to know about the day and the saint that it celebrates.

“St Patrick is a Catholic saint, credited with bringing Christianity to Ireland in the 5th century.

“While exact dates vary, most historians agree that St Patrick was born between the late 300s and the mid-400s.

“Despite being such a important figure in Irish culture, St Patrick was most likely born in Britain, near the southern border between modern Wales and England, according to medieval Ireland historian Lisa Bitel.”

Read more at ABC