A long time ago I had this wonderful teacher who condensed the entire grammar of Irish in 13 pages! One of his key phrases that I remember was "na" never, never, never, never, NEVER, aspirates, worth repeating here. He would then smile and say "except of course in one instance "na chéad" meaning 'of the first'. Here we see the genius of the language where "na chéad" means 'of the first' and "na céad" means 'of the hundredth and the importance of grammar, where the meaning is clear from the use of aspiration.
And so.....it has to be "Beannactaí na FÉILE VailintIn".