It was emigrants, particularly to the United States, who transformed St. Patrick's Day into a largely secular holiday of revelry and celebration of things Irish. Cities with large numbers of Irish immigrants, who often wielded political power, staged the most extensive celebrations, which included elaborate parades. Boston held its first St. Patrick's Day parade in 1737, followed by New York City in 1762. Since 1962 Chicago has coloured its river green on March 17th. Irish and non-Irish alike commonly participate in the “wearing of the green”—sporting an item of green clothing or a shamrock, the Irish national plant, in the lapel. Corned beef and cabbage are associated with the holiday, and even beer is sometimes dyed green to celebrate the day. Although some of these practices eventually were adopted by the Irish themselves, they did so largely for the benefit of tourists.