St. Patrick's Day is on March 17th as it always is and you think you know all there is to now about this Irish holiday...but wait, here are some thing you may not now about the wearing of the green.

Wearing of the green is the odd thing about St. Patrick's Day because we should be wearing blue. St. Patty's color was a light blue, green didn't come into popularity until the late 18th century.

St. Patrick wasn't Irish he was British. He introduced Christianity to Ireland but was born in Roman Scotland or Wales.

St Patrick's Day in Ireland is a national holiday.

The world's largest St. Patrick's Day parade is in New York City. The parade has been going on since 1762 but no floats, cars or other such things are aloud.

Chicago has a spectacle all it's own by dumping green dye into the Chicago River a tradition that dates back to 1962. (photo above is of the river)

St Patrick's Day used to be a 'dry' holiday since it was religious holiday and pubs across Ireland had to close. In 1970 it was converted to a national holiday and the alcohol began to flow.

St. Patrick is credited with driving the snakes out of Ireland but according to fossil records Ireland never had snakes.

The world runs up a big bar tab on St. Patty's Day with a estimated total sales of beer on the one day at $245 million.

There are no female leprechauns and the gold they are guarding was earned by making and mending shoes. (how do they have other leprechauns if there are no females?)

According to mentalfloss.com the phrase 'Erin go Bragh' translates to 'Ireland Forever.'