Today is St. Patrick's Day. As a card carrying Italian, I had to do some research to find out more about this holiday as it's not one I'm that familiar with. Here's what I found:
The tradition of wearing green actually came from a different tradition of pining a shamrock to one's clothing - "the wearing of the green" - which was a sign of Irish nationalism or loyalty to the Roman Catholic religion.
While the holiday is fairly secular in the States, in Ireland, it's still a religious holiday.
It's been around a long time. On March 17th 1780, George Washington gave his troops the day off as an act of solidarity for their Irish brothers fighting for their own independence.
One reason St. Patrick's Day has become so popular is because many people see it as the unofficial beginning of spring.
Need some Leprechaun fun? Go play this game. Then eat some corned beef and cabbage. Happy St. Patrick's Day!