Artificial holidays give us an excuse to put on a funny hat and start drinking. You certainly don't have to be Mexican to celebrate Cinco de Mayo, to name just one. Halloween, Beaujolais Nouveau, Mardi Gras, even the Fourth of July, Bastille Day and, of course, the granddaddy of celebrations, St. Patrick's Day, when everyone becomes Irish for the night.
It's no different here in Paris. British pubs abound, and were jammed into the wee hours. Yes, they served green beer. Big night for Irish whiskey, too.
No green wine in Paris....?
hollis