Why the world celebrates St. Patrick’s day: The history and global rise of Ireland’s biggest festival

What began as a religious feast day in Ireland has evolved into an international celebration of Irish culture and heritage.

Across Ireland and around the world, St Patrick’s Day is marked with parades, music, Irish dancing, traditional food and the wearing of green.

Celebrated every year on March 17, the day commemorates St Patrick, the patron saint of Ireland.

Speaking to Firstpost, St. Patrick’s Festival CEO Richard Tierney said the occasion holds deep national significance. “It's our National Day. A day to be proud. The world looks in at us, and we get to showcase the very best of what it means to be Irish. It also marks the start of the tourist season, making it an incredibly important day for Ireland.”

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Who was St Patrick?

St Patrick was born in a village in Roman Britain in the fifth century. As a teenager, he was reportedly kidnapped by Irish pirates and enslaved in Ireland, where he spent years tending animals and learning the Irish language.

After escaping captivity and later training as a priest, he returned to Ireland as a missionary, working to convert the Irish to Christianity. Tradition says he used the three-leaf shamrock to explain the concept of the Holy Trinity to Irish pagans.

Why green is associated with the festival?

The colour green has strong political and religious associations in Ireland. It is one of the three colours of the Irish national flag, alongside white and orange, and historically symbolised Irish Catholic identity.

Today, wearing green has become one of the most recognisable traditions of St Patrick’s Day celebrations worldwide.

From religious feast to public festival

In Ireland, St Patrick’s Day was originally observed as a religious feast day, with early celebrations centred around church services, dinners, concerts and dances.

Interestingly, the tradition of large public parades began outside Ireland. Irish emigrants in the United States organised parades to celebrate their heritage. One of the earliest recorded St Patrick’s Day parades took place in New York City in 1762, while the first parade held in Ireland itself occurred in Waterford in 1903.

Today, the biggest celebrations take place in Dublin, where the three-day St Patrick’s Festival culminates in the National St Patrick’s Day Parade on March 17.

The parade attracts more than 500,000 spectators each year, featuring colourful pageants, marching bands from across the world and community participants from throughout Ireland.

Music, dance and traditional food

Visitors celebrating on the Emerald Isle can expect lively performances of Irish folk music featuring instruments such as the tin whistle, fiddle, bodhrán and harp.

These performances are often accompanied by traditional Irish dances including step dancing, sean-nós dancing and céilí dancing.

Food also plays a key role in the celebrations. While bacon and cabbage is widely associated with St Patrick’s Day, particularly in the United States, other traditional dishes include Irish stew, soda bread, colcannon and coddle.

Although the holiday was once a dry day in Ireland because of its religious significance, modern celebrations often include pints of Guinness, cider or Irish whiskey.

One old custom known as “drowning the shamrock” involves dropping a shamrock into the last glass of whiskey before making a toast to the saint.

A global celebration

Today, St Patrick’s Day is celebrated far beyond Ireland. The largest parade in the world takes place in New York City, while Chicago famously dyes its river green each year using eco-friendly dye, a tradition dating back to 1962.

Major festivities also take place in cities such as Boston, Philadelphia and Savannah.

Across Europe, London hosts a large St Patrick’s Day celebration at Trafalgar Square, while cities in Germany including Berlin, Hamburg and Munich organise their own events.

In Asia, Tokyo hosts the region’s oldest and largest St Patrick’s Day parade. Irish communities across Australia also celebrate with parades, picnics and concerts.

Globally, more than 300 landmarks across 50 countries are illuminated in green on March 17, from the Colosseum in Rome to the Christ the Redeemer statue in Rio de Janeiro.

Indian diaspora joins the celebration

The festival has also become a platform for cultural exchange. In Ireland, members of the Indian diaspora have begun participating in the celebrations.

This year, the collective Indian Ladies in Ireland took part in pre-parade festivities with a colourful performance that blended classical Indian dance with Bollywood choreography, set to a mix of Irish-themed and Indian music.

Their participation reflects the shared values of community, creativity and cultural exchange that increasingly define St Patrick’s Day celebrations around the world.