If you're writing your Christmas cards this year and looking to use some Gaeilge, here are some festive phrases to use.
Nollaig mhór mhaith duit!
Merry Christmas/Happy Christmas!
Nollaig faoi shéan agus faoi mhaise duit!
Merry Christmas/Happy Christmas!

Guím gach rath agus séan ort san athbhliain.
I wish you a happy and prosperous new year.

Athbhliain faoi mhaise duit!
Happy New Year!