Is it spring yet? Whatever the weather, one sure sign in Chicago is the annual revelry of the St. Patrick’s Day Parade and dyeing the Chicago River green.
Chicago has been dyeing its river green since 1962. The keepers of the traditions secret? Plumbers! Learn more about how plumbers started the Chicago River dyeing ritual and how they ensure a colorful and environmentally safe St. Patrick’s Day every March.
What is your favorite sign of spring?
