I was thinking the same thing. I mean, corn beef and cabbage? It is not like indulging in lobster (legal on Lenten Fridays,) or blackened sea bass Alexander (legal on Lenten Fridays.) This illustrates the kind of rigidity that the Pope has been speaking against. As Jesus would say, we ought to do one without neglecting the other. Stay within the Church’s rules, but more importantly, within the spirit of the rules that that the Church gives. So, if the diocese permits a celebration for this day, then treat it as a Sunday in Lent, in which you can celebrate, but then add something back in.
Everyone must do what they think best, but if no one has any idea, read the book of James this week, or Romans, or one of the Gospels, etc., as an act of penance in substitute for Friday. And then, still remember the need for moderation.