Early Irish settlers in NYC embraced their new found freedom by parading down NYC's Fifth Avenue. The annual parade also helped homesick people to bond and keep their cultural identity alive.
In Ireland, St. Patrick's day is more of an irish cultural day rather than an excuse for teenager to drink green beer! Sorry to burst your bubble but we do not wear green. Mea culpa, but we do not go around saying "top of the morning to you". Nope, no green hats but a nice Donegal tweed ivy cap looks good on everyone.
In any event, you do not want to anger the leprechauns (the little people) and their three leaf shamrocks.
Leprechauns hate 4 leaf clovers. Team trump may be messing with the wrong immigrants ;-)
Interesting article from the New York Times.