The St. Patrick's Day Parade in New York City is not only one of the oldest parades in the United States (started in 1762), it's also the largest. At almost six hours long, with more than 2 million attendees, and 100,000 participants!
Blue was the color originally associated with St. Patrick, but green is now favored.
Q: Why should you never iron a four-leaf clover?
A: You don’t want to press your luck!