According to history.com there are 34.7 million United States residents who claim Irish ancestry.
The history of St. Patrick's Day isn't a familiar story to everyone. Some South Central Kentuckians had their green on but were technically unsure why.
"I think it's just an excuse for a bunch of Irish people to get together and drink I dunno", says Bronson Spears.
But St. Patrick's Day actually has a lot of history.
St. Patrick is the patron Saint of Ireland and is one of Christianity's most wide known figures.
Even though Bronson doesn't know the specific history but he does know to wear green on this holiday.
"I've got enough green on I don't think I am going to get pinched", says Spears.
While you will find some who are determined to bring out the green on this holiday, there are others who chose not to take part.
"Finding something green it's too much trouble. My work shirt is blue and my jeans are blue and I just don't have a lot of green", says Adam Herron.
Some say they won't go overboard for this holiday.
"If they're all decked out and their hairs all done and their all decked out in complete green I think it's a little ridiculous", says Sarah Thacker.
Although Thacker says she did used to take part in the holiday especially when she was in school.
That's because she feared being pinched.
You may also wonder where pinching on St. Patrick's day came from.
Friends of St. Patrick.org says traditionally those of Irish decent are pinched for not wearing green on the holiday.