To the truly Irish — whether in America, the old country or the global diaspora of Eire — St. Patrick’s Day is about something quite different than you may find tonight in Fells Point.

“A very traditional affair in Ireland,” said the muralist Patrick John Harnett, 49, who immigrated to Baltimore from County Limerick in 2011. “Religion, heritage and family.”

Of course there is a toast or two at the local pub — a day when children are allowed to run in and out of saloons with little admonishment — but few abide Root Boy Slim’s encouragement to “Boogie ’til You Puke.”