Why We Celebrate St. Patrick’s Day

Bonus Episode — Why We Celebrate St. Patrick’s Day

A Curious by Design Subscriber Special

Green shirts.

Green rivers.

Green beer.

Every March 17th, the world turns green—but most of what we associate with St. Patrick’s Day didn’t actually begin in Ireland.

In this subscriber special of Curious by Design, we explore how a quiet religious feast day honoring a 5th-century missionary transformed into one of the most recognizable cultural celebrations in the world.

The story begins with Saint Patrick, a kidnapped teenager from Roman Britain who was enslaved in Ireland before eventually returning as a Christian missionary. After his death around the year 461, March 17th became a modest religious observance in Ireland—more about church services and family meals than parades or parties.

The modern celebration took shape somewhere else entirely.

Irish immigrants in 18th- and 19th-century America used St. Patrick’s Day parades as public expressions of identity and pride during a time of intense discrimination. Over time, symbols evolved: the shamrock, the color green tied to Irish nationalism, and eventually traditions like green beer and massive parades.

This episode traces how religion, immigration, politics, and tourism layered together over centuries to create the holiday we recognize today—one that eventually became so popular abroad that Ireland itself re-imported the celebration in the 1990s.

St. Patrick’s Day didn’t just appear fully formed.

It evolved—

through migration, culture, and reinvention.

And once you see the layers behind it, March 17th starts to look a little different.

That’s Curious by Design.

Transcript

SPEAKER_00 0:00

Welcome to Curious by Design. I'm your host, Jason Hardwick. This is the show about how things get built and why they end up the way they do. We tend to think design is about logos, architecture, or how something looks. But in reality, design is about choices. It's about trade-offs. It's about the invisible decisions that shape businesses, cities, systems, and even our everyday lives. On this podcast, we explore the thinking behind the work, how we got here, what worked, what didn't. All starting from the same place. Curiosity. A way to understand what's working, what's broken, and how we might design things better. If you've ever found yourself asking, why did they do that? You're in the right place. This is Curious by Design. Think about March 17th. What's the first thing that comes to mind? For most people, it's green. Green shirts, green hats, green decorations in store windows, green beer and pine glasses, entire rivers dyed green. Some people wear green socks. Others wear green wigs. Some even wear green suits. And if you forget to wear green, someone might pinch you. March 17th has become one of the most recognizable holidays in the world. But here's the interesting part. Most of what we associate with St. Patrick's Day didn't start in Ireland. The modern celebration of St. Patrick's Day is actually the result of centuries of cultural change, a mix of religion, immigration, national identity, and a surprising amount of reinvention, because the holiday we celebrate today looks very different from the one that originally existed. To understand why, you have to go back more than 1,500 years. The story begins not in Ireland, but in Roman Britain. Around the late 4th century, a boy was born into a Christian family. His name was St. Patrick. At the time, Britain was still under Roman rule. Patrick's father was a deacon in the Christian church, but according to Patrick's own writings, he wasn't especially religious growing up. His life changed suddenly when he was about 16 years old. Irish raiders attacked the region where he lived. They kidnapped him and brought him across the Irish Sea. Patrick was sold into slavery. For six years, he worked as a shepherd in rural Ireland, isolated, cold, far from home. He spent long days tending animals in the hills. During that time, Patrick began praying constantly. Later in life, he would write that his faith deepened during these years of hardship. Eventually, he claimed to have experienced a dream. In the dream, a voice told him that a ship was waiting to carry him home. So Patrick escaped. He walked nearly 200 miles to the coast, found a ship, and returned to Britain. For most people, that would have been the end of the story. But for Patrick, it was only the beginning. Years later, Patrick had another vision. This time, according to his writings, he heard the people of Ireland calling him back, not as a prisoner, but as a missionary. He returned to Ireland voluntarily. His mission was to spread Christianity. Over the following decades, Patrick traveled across the island, teaching, preaching, establishing churches, and converting communities to Christianity. By the time of his death, Christianity had spread widely throughout Ireland, and Patrick became one of the most important religious figures in Irish history. But many of the stories we associate with him today are more legend than documented fact. One of the most famous is the story that Patrick drove all the snakes out of Ireland. It's a dramatic story, but there's one problem. Ireland never had snakes. After the last ice age, rising sea levels separated Ireland from mainland Europe. By the time reptiles began spreading across Europe again, Ireland was already an island. Snakes simply never reached it. So the snake story is likely symbolic. Historians believe the snakes represented pagan belief systems. Patrick wasn't literally removing reptiles. He was replacing older religious traditions. Another famous symbol associated with Patrick is the shamrock. According to tradition, Patrick used the shamrock to explain the Christian concept of the Trinity. Three leaves, one plant, Father, Son, Holy Spirit, three distinct parts, one unified whole. Whether Patrick actually used the shamrock this way is uncertain, but the story endured. Over time, the shamrock became one of the most recognizable symbols of Ireland, and eventually one of the most recognizable symbols of St. Patrick's Day. Patrick is believed to have died on March 17th, sometime around the year 461. Over the centuries that followed, he was honored as the patron saint of Ireland, and March 17th became a feast day in his memory. But the early celebrations of St. Patrick's Day looked nothing like the holiday we know today. For most of its history, St. Patrick's Day in Ireland was a quiet religious observance. Families attended church, prayers were offered, and meals were shared. It was meaningful, but it was modest. Ireland was historically a deeply Catholic country, and March 17th fell during Lent, a period traditionally associated with fasting and restraint. But feast days allowed for exceptions. On St. Patrick's Day, people could enjoy foods normally restricted during Lent, so families gathered for a meal, often including meat, which would have been avoided on other Lenten days. But there were no massive street celebrations, no giant parades, no green beer. Those traditions would emerge somewhere else entirely. The first recorded St. Patrick's Day Parade didn't happen in Ireland. It happened in the United States, in Boston, in 1737. Irish immigrants living in the American colonies organized a celebration to honor their heritage. This was more than a party. It was a statement. Because Irish immigrants in early America often faced intense discrimination. They were poor, Catholic, and culturally different from many of the Protestant communities already established in the colonies. Newspapers and political cartoons frequently portrayed Irish immigrants in degrading ways. Job postings sometimes included signs that read, No Irish need apply. St. Patrick's Day offered something powerful, a chance to celebrate identity publicly, a way to say, we are here, and we are proud of where we come from. Irish immigration to the United States grew dramatically during the 19th century, especially during the Great Famine. When the potato crops failed across Ireland, millions faced starvation. Over one million people died, and millions more emigrated. Large Irish communities formed in American cities like New York, Boston, Philadelphia, and Chicago. St. Patrick's Day became an important cultural anchor for these communities. Parades grew larger. Irish organizations marched together. Bands played music. Flags were carried through crowded city streets. These parades weren't just celebrations, they were demonstrations of belonging. Over time, politicians began to recognize their importance. Irish immigrants represented a growing voting population. Supporting St. Patrick's Day events became politically advantageous. Mayors attended parades. Governors issued proclamations. Eventually, even U.S. presidents would acknowledge the holiday. The celebration had moved from immigrant tradition to national event. Something else changed during this time. The color associated with St. Patrick. Originally, the color most closely linked to Patrick was blue. In early Irish iconography, Patrick was often depicted wearing blue robes. Even the Order of St. Patrick, an Irish chivalric order founded in the 18th century, used a color known as St. Patrick's Blue. But over time, green took over. Green had long been associated with Ireland's landscape, rolling green hills, lush fields, dense vegetation. This led to Ireland being nicknamed the Emerald Isle. Green also became tied to Irish nationalism. During the 18th and 19th centuries, Irish independence movements adopted green as a symbol of national identity. Songs like The Wearing of the Green reinforced the connection. So when Irish immigrants in America celebrated their heritage, green became the obvious symbol. Green clothing, green banners, green decorations. Eventually, green everything. And then there's the green beer, one of the most famous St. Patrick's Day traditions in America. But it's actually a relatively recent invention. One of the earliest recorded examples occurred in the early 20th century. A New York physician reportedly added dye to beer during a St. Patrick's Day celebration. The color was eye-catching, the novelty spread. Today, bars across the United States dye beer green every March. It's not a historic Irish tradition, but it's become a defining part of the modern celebration, and it perfectly illustrates how traditions evolve. Sometimes the most recognizable customs are the newest ones. Large-scale parades also became a defining part of the holiday. Cities across the United States host massive St. Patrick's Day parades. But one of the most famous traditions takes place in Chicago. Every year, the Chicago River is dyed bright green. The tradition began in 1962. City workers originally used dye to track illegal sewage discharges into the river. Someone realized the dye could also be used for St. Patrick's Day. The first attempt turned the river green for nearly a week. Today the formula is more controlled. The color lasts only a few hours, but the spectacle has become iconic. Crowds gather along bridges and river walks, waiting to watch the water change color. For much of the 20th century, celebrations in Ireland remained relatively quiet compared to those in America. In fact, pubs in Ireland were once required by law to close on March 17th. The holiday was considered primarily religious, not a drinking celebration. That changed in the late 20th century. Irish tourism officials realized something surprising. The largest St. Patrick's Day celebrations in the world were happening outside of Ireland. So Ireland made a decision. They leaned into the global version of the holiday. In 1996, Ireland launched the first official St. Patrick's Festival in Dublin. The event expanded St. Patrick's Day into a multi-day celebration. Concerts, street performances, cultural events, and of course, a large parade. Ireland had effectively re-imported a holiday that had evolved abroad. Today, St. Patrick's Day is celebrated in more than 100 countries. Landmarks around the world light up green. The Sydney Opera House, the Coliseum, even the Great Wall of China has occasionally joined the celebration. What started as a quiet religious feast day has become a global cultural event, a mix of history, identity, celebration, and tradition. St. Patrick's Day shows how holidays evolve. They travel, they adapt, they absorb new meaning. They reflect the cultures that celebrate them. Every parade, every shamrock, every green river, every glass of green beer carries pieces of a story that stretches back more than 15 centuries. From a kidnapped teenager in Roman Britain to a missionary in Ireland, to immigrant communities celebrating identity in America, to a global celebration recognized around the world. A holiday that changed shape over time, layer by layer, generation by generation, until it became what we see today. So the next time you see someone wearing green on March 17th, or hear the sound of bagpipes in a parade, or watch a river turn bright green, remember the story behind it. A story of faith, migration, identity, and reinvention. A holiday that didn't just happen, it evolved. And that is Curious by Design. If you enjoyed this deeper dive, thank you for being a subscriber. 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