St. Patrick's Day: Origins, Meaning & Background - HISTORY
Chicago dyes river green for St. Patrick's Day again
Chicago delivers St. Patrick's Day surprise, as river runs green again
Chicago Green River: The History Behind This St. Patrick's Day Tradition
Chicago dyes river green every St Patrick's Day - but it's all down to an 'accident' - Daily Star
Chicago River green 2021: City completes longstanding St. Patrick's Day tradition amid COVID restrictions - ABC7 Chicago
St. Patrick's Day: What time will the Chicago River be dyed?
St Patrick's Day: Chicago dyeing its river green isn't an environmental disaster
Chicago river goes green for St Patrick's Day, despite environmental questions