It's St. Patrick's Day!  If you're Irish, and for those of us Irish at heart, today we're wearin' o' the green and most likely a shamrock.

Flickr/one2c900d

The shamrock has been used as a symbol of Ireland since the 5th century.

Over many years the shamrock has become symbolic of many things.

It's believed that St. Patrick used the shamrock to illustrate the doctrine of the Holy Trinity as he introduced Christianity to Ireland.

The original shamrock was called the seamroy by the Celts.  Seamroy translates to "little plants."  It was considered a a sacred plant that stood for the re-birth of spring.

On occasion, a fourth leaf will grow on a shamrock transforming the plant into a four leaf clover.  This happens so rarely, the Celts believed finding a four leaf clover would bring you luck.

So, today have some fun when the Irish and Irish at heart are wearin' o' the green.

Happy St. Patrick's Day!

And please, don't forget to wear that shamrock.