A lesson in clovers so you don't insult anyone this St. Paddy's Day

Come March 17, everyone gets to be Irish. And while wearing green is easy, if you're like us, you sometimes get your clovers confused.

One stands for Ireland, St. Patrick and his day. And the other is just super rare.

According to ancient legend, Patrick became a Catholic missionary and used the three-leaf clover to explain the Holy Trinity — in Christianity, that's the Father, the Son and the Holy Spirit.

St. Patrick wasn't Irish himself, but legend gives him credit for bringing Christianity to the country. For that, religious feasts were held in his honor.

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St. Patrick's Day celebrations around the world
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St. Patrick's Day celebrations around the world
Britain's Prince William, Duke of Cambridge (C) and his wife Britain's Catherine, Duchess of Cambridge (L) visit the Irish Guards, during a St Patrick's Day parade at Cavalry Barracks in Hounslow, west London on March 17, 2017. / AFP PHOTO / Justin TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
WASHINGTON, DC - MARCH 16: (AFP OUT) Fountain on the South side of the White House is dyed green for St. Patrick's Day in Washington D.C.,on March 16, 2017 in Washington, DC.(Photo by Olivier Douliery-Pool/Getty Images)
Cheltenham , United Kingdom - 16 March 2017; A statue of 1986 Gold Cup-winner Dawn Run, trained by Paddy Mullins and ridden by Jonjo O'Neill, is illuminated green for St. Patrick's Day during the Cheltenham Racing Festival at Prestbury Park in Cheltenham, England. (Photo By Cody Glenn/Sportsfile via Getty Images)
The Trinity College in Dublin goes green on the eve of St Patrick's Day. On Thursday, March 16, 2017, in Dublin, Ireland. (Photo by Artur Widak/NurPhoto via Getty Images)
A man ready for St Patrick's Day walks in Dublin's CIty Center on the eve of the Irish National Day. This year edition of St Patrick's Festival takes place from March 16th-19th, and brings 3,000 artists, musicians, dancers, poets and performers in a stanning programme with many events spanning four days and nights. On Thursday, March 16, 2017, in Dublin, Ireland. (Photo by Artur Widak/NurPhoto via Getty Images)
A scene from Dublin's city center on the eve of St Patrick's Day. This year edition of St Patrick's Festival takes place from March 16th-19th, and brings 3,000 artists, musicians, dancers, poets and performers in a stanning programme with many events spanning four days and nights. On Thursday, March 16, 2017, in Dublin, Ireland. (Photo by Artur Widak/NurPhoto via Getty Images)
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The feasts were a spiritual affair, heavy on prayer and light on alcohol. You couldn't even drink in Ireland on the holiday until the 1970s.

Irish immigrants in the U.S. started throwing parades for St. Patrick, and the holiday transformed into a celebration of Ireland in general.

SEE MORE: Gay Veterans Group Will Walk In Boston's St. Patrick's Day Parade

And with America's excitement to celebrate the day, we've often worn the wrong clover.

The four-leaf variety has too many leaves to represent St. Patrick. But because only about 1 out of 10,000 clovers has an extra leaf, they're supposed to bring good luck.

But there's one other faux pas you could avoid.

In Ireland, Patty with two "Ts" is a nickname for Patricia. Paddy with two "d's" is the one for Patrick. Suddenly, St. Paddy's Day makes a lot more sense.

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