•Since the 1960s, the city of Chicago has been dyeing the Chicago River green in honor of St. Patrick’s Day. More than 400,000 spectators watch as members of the local plumbers union add an orange powder (it turns green when it hits the water) into the river. It takes about 45 minutes to color the water and stays green for up to five hours.

•Nine men of Irish ancestry signed the Declaration of Inde…