Photo via PickPik under the Creative Commons License
St. Patrick's Day is on March 17th every year
Chicago uses 40 lbs of green dye to color the river. The dye lasts for about 5 hours. Happy St. Patrick’s Day!
The Declaration • March 17, 2020 • https://thedeclarationatcoloniahigh.com/47079/fun-factofthe-day/the-chicago-river-is-dyed-green-on-st-patricks-day/
The Chicago River is dyed green on St. Patrick’s Day