By the numbers: St. Patrick's Day

Story highlights

  • Americans could spend nearly $5 billion celebrating St. Patrick's Day this year
  • With more than 34 million citizens of Irish ancestry, U.S. remembers Ireland in town names
  • How many Americans plan to celebrate St. Paddy's Day in a bar or restaurant? 30.5%

When you suit up in green and head to the St. Patrick's Day parade or your favorite Irish bar to celebrate, dropping these facts and figures about the holiday's origins will impress your fellow revelers!

5: St. Patrick's Day began as a religious holiday to honor the saint who, in the fifth century, introduced Christianity to Ireland.

1762: The first St. Patrick's Day parade happened in New York on March 17, 1762.

133 million: People in the U.S. who plan to celebrate St. Patrick's Day in 2014.

83.2%: Percentage of those celebrating who plan to wear green.

$4.8 billion: Expected St. Patrick's Day spending in 2014.

30.5: Percent of Americans who plan to go to a bar or restaurant to celebrate.

2,900: Species of snakes. According to legend, St. Patrick drove all of the snakes from Ireland.

1 in 10,000: Occurrence of a white four-leaf clover for every common three-leaved clover.

40: Pounds of dye needed to turn the Chicago River green for the city's St. Patrick's Day parade.

7: Places in the U.S. named Shamrock.

16: Places in the U.S. named Dublin.

6: Movies in the original "Leprechaun" franchise. Jennifer Aniston had one of her first starring roles in the original "Leprechaun," released in 1993. A seventh movie, "Leprechaun: Origins," is planned for release this year.

4: Ireland's global rank in beer consumption per capita in 2011, with 101.1 liters.

15: The U.S. rank in beer consumption per capita, with 76.6 liters.

$19.99: Price of a "Kiss Me, I'm Irish" T-shirt on Cafe

142: Rank in popularity in the U.S. of the baby name Patrick in 2012.

34.2 million: People in the U.S. with Irish ancestry, as of 2012.

530: Calories in a 12-ounce McDonald's limited-edition green Shamrock Shake. The large 22-ounce size has 820!