Saint Patrick's Day 2026: Why Do We Celebrate This Festive Occasion on March 17th? History and Origins

Published by Caroline de Sortiraparis, Laurent de Sortiraparis · Photos by Caroline de Sortiraparis · Updated on February 10, 2026 at 10:53 p.m.
March 17 is St. Patrick's Day, or "Paddy's Day" as it's known in Ireland. But what exactly is celebrated on this day, and why March 17? Here's a look back at the history and origins of St. Patrick's Day!

Every March 17th, Irish communities around the world come together to celebrate Saint Patrick. With green decorations and beer flowing freely (though always in moderation), few actually know the story and origins of this festive day. So, a quick historical recap is in order.

The date of March 17th marks the death anniversary of Saint Patrick in the year 461. Still regarded today as the patron saint of Ireland, Saint Patrick was born in 4th-century Britain. The son of a deacon, he was reportedly kidnapped at just 16 years old. He was then taken as a slave by an Irish druid. After several years working as a shepherd in Gaelic Ireland, he is believed to have escaped his captors.

It was then that he decided to study theology in order to become a Catholic priest. He then returned to Ireland with a mission: to evangelize the entire country. To this day, the missionary is known as the founder of Irish Christianity. Legend has it that he tried to explain the notion of the Holy Trinity using a shamrock, the symbol of St. Patrick's Day.

It was not until the 17th century that the Catholic Church officially recognized Saint Patrick as a religious feast day. Then, in 1631, Pope Urban VIII designated March 17th as the celebration of Saint Patrick’s Day. Eventually, this religious observance evolved into a popular festival, especially after March 17th was declared an official public holiday in Ireland in 1903. It wasn’t until 1931 that Ireland hosted its very first Saint Patrick’s Day parade.

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Practical information

Dates and Opening Time
Starts March 17, 2026

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