Did you know? The Chicago Journeymen Plumbers Local Union 130 UA has carried out the task of dyeing the Chicago River green for St. Patrick’s Day nearly every year since 1962. Chicagoans returned downtown on March 15 to watch the event for the city’s 2025 St. Patrick's Day celebration.

You can learn more about this year's river-dyeing festivities and how the tradition started in the articles below: