It translates as 'Happy Christmas to you' (addressing one person) and is pronounced 'null-egg hunna gh(u)it'.To more than one person would be 'Nollaig shona dhaoibh'. dhaoibh [gh(u)eev].
I want to know how to say "Nollaig Shona Dhuit". (I'm not sure how to pronounce it.)
Answer:
The Irish for "Merry Christmas (to you)". To an American it would sound something like
nnull-ig hun-a...
Nollaig is the Irish word for Christmas and it is also used as the name of the month of December.
Another Answer:
"At Christmas" would be faoi Nollaig. December could also be Mí na Nollag.