Saint Patricks Day

In 1962, a crew of Chicago plumbers tipped a hundred pounds of dye into the river that runs through the city’s downtown and turned it emerald for a week. They had noticed that the same orange powder they used to trace leaks in sewage pipes glowed bright green in water, and someone made the obvious leap. That bit of municipal mischief, repeated every spring since, is as good a snapshot as any of what Saint Patrick’s Day has become: a sober Christian feast day, fixed on 17 March to mark the death of Ireland’s patron saint, that has grown into one of the most exuberant and well-travelled celebrations on the calendar.

The man behind the holiday

The saint at the centre of it all was not, by birth, Irish at all. He was born in Roman Britain in the late fourth or early fifth century, the son of a man named Calpurnius, and tradition gives his original name as Maewyn Succat. Just before his sixteenth birthday, Irish raiders seized him from his family’s estate and carried him across the sea into slavery. For roughly six years he tended sheep on a hillside in the north of Ireland — tradition places him on Slemish in County Antrim — alone, cold and far from home. It was there, by his own later account in his Confessio, that a private and intense faith took root.

He escaped, walked a great distance to a waiting ship, and made his way home. He might have stayed there. Instead, after training for the priesthood, he returned as a missionary to the very island where he had been a slave. That return is the hinge of the whole story: a man going back, of his own free will, to the place of his captivity in order to convert it.

Two of his own writings survive, which is rare for so early a figure: the Confessio, a spiritual autobiography written to defend himself against critics within the church, and a furious open letter condemning the soldiers of a British warlord named Coroticus who had slaughtered and enslaved some of his Irish converts. They are plain, urgent documents, the voice of a real and rather embattled man, and they are the bedrock beneath the later mythology. Confusingly, much of the picturesque detail comes not from Patrick himself but from accounts written centuries after his death, and scholars have long suspected that the traditions may even conflate the deeds of two different early missionaries to Ireland.

The legends accumulated afterwards. The most famous holds that he drove the snakes out of Ireland — a tidy tale undermined by the awkward fact that post-glacial Ireland never had any snakes to begin with, so the story is best read as an allegory for displacing the old pagan order. More charming, and more useful, is the tradition that he plucked a three-leaved shamrock from the grass to explain the Trinity: three leaves, one stem, three persons, one God. Whether or not he ever did so, the shamrock has been bound to both saint and nation ever since. He is said to have died on 17 March, and is traditionally buried at Downpatrick in County Down, where a slab of granite on Cathedral Hill marks the spot.

How a feast day became a festival

For centuries the 17th of March was a quiet, solemn affair in Ireland: a holy day on which the faithful went to church, and a brief reprieve from the austerities of Lent during which a little feasting was permitted. The riotous, parade-led version most of the world now recognises was not born in Ireland at all. It was made by people who had left.

The first recorded Saint Patrick’s Day parade took place not in Dublin but in Boston, where the city’s Irish community gathered to honour the saint on 17 March 1737. As the great waves of Irish emigration carried millions across the Atlantic over the following century, especially in the wake of the Great Famine, they brought their devotion with them — and, finding themselves a minority often treated with suspicion, they made the day a public assertion of who they were. The parade, the green, the noise: these were the diaspora’s invention, a way of taking up space in a new country. Only later did this more festive character travel back across the water to Ireland itself.

Why the day endures

There is a neat irony in the fact that a feast for a fifth-century slave-turned-missionary should have become a byword for celebration. Part of the answer is simply numbers: tens of millions of people outside Ireland claim Irish descent, and for them the day is a once-a-year handle on a heritage that everyday life rarely surfaces. To wear green and join a parade is to say, briefly and cheerfully, this is where I come from.

But the religious thread has not been severed. For those who keep it as a holy day, Patrick remains a figure of striking resilience — a man who turned the worst thing that ever happened to him into the work of his life. His story of captivity, escape and deliberate return carries a force that has nothing to do with shamrocks, and a great deal to do with the idea that a person can choose to redeem a place that once wronged them.

The day’s most distinctive modern quality, though, is its openness. It is one of very few national or religious observances that actively welcomes outsiders to take part. You do not need an Irish grandmother to wear green on the 17th, and almost nobody minds if you don’t have one. That genial inclusiveness — anyone can be Irish for a day — is much of why the celebration has spread so far. The same hospitality binds it to other patron-saint days across these islands, from Saint David’s Day in Wales to Saint Andrew’s Day in Scotland, each a yearly anchor for a nation’s sense of itself.

How it is marked, from Dublin to Tokyo

In Ireland the day is a public holiday, observed with church services, family gatherings and parades, the largest of which fills the centre of Dublin as part of a multi-day festival. The capital’s celebrations draw visitors from across the world, but smaller towns hold their own processions, and the religious character is more visible there than the tourist coverage tends to suggest.

Abroad, the scale can be startling. Cities with deep Irish roots stage enormous parades — New York’s is among the oldest and largest of all — and the now-familiar trick of turning landmarks green has spread from Chicago’s river to buildings, fountains and monuments on several continents. The day reaches places with no obvious Irish connection at all: parades and parties take place from Tokyo to Buenos Aires, often organised by small expatriate communities and embraced enthusiastically by locals.

What ties these celebrations together is a recognisable kit of symbols. The shamrock, worn on the lapel, recalls Patrick’s lesson on the Trinity. The colour green — for the island’s landscape, for Irish nationalism, for the saint himself — dominates everything. Traditional music played on fiddle, flute and the goatskin bodhrán fills pubs and halls, and step-dancing, with its rigid upper body and rapid feet, draws crowds. The leprechaun, a figure from older folklore, has been adopted as a more light-hearted, commercial mascot, particularly overseas, where the day leans hardest into pageantry.

Fun facts

• The first Saint Patrick’s Day parade was held in Boston in 1737, not in Ireland — the festive, parade-led version of the day is largely an invention of the Irish diaspora.
• Chicago has dyed its river green every year since 1962, after city workers realised the dye they used to detect sewage leaks turned the water a vivid emerald.
• The “snakes” Patrick supposedly banished never existed: Ireland has been free of native snakes since the last Ice Age, so the legend is almost certainly symbolic.
• Patrick was British, not Irish, and first arrived in Ireland as a kidnapped slave around the age of sixteen, herding sheep for roughly six years before escaping.
• Up to 3,000 pilgrims still climb Croagh Patrick in County Mayo each year, many barefoot, on the mountain where the saint is said to have fasted for forty days.

A closing reflection

It is worth pausing on the strangeness of what we celebrate on 17 March. The man we honour was a foreigner, a former slave, who chose to spend his life among people who had once held him captive. The holiday that bears his name has done something similar in reverse: it has gone out into the world and made itself at home everywhere, asking nothing of those who join in except a little green and a little goodwill. A day that began with one person’s improbable return has become an open invitation, and perhaps that is the most fitting tribute a wanderer’s saint could have.