Family prints
Nollaig shona
Happy Christmas.
The Christmas card standard: add duit (to one person) or daoibh (to several) to address it.
The wording is quoted exactly from the record and its cited source; personalisation touches only your own names and date, never the Irish.
About this saying
The standard Christmas greeting, attested in Foras na Gaeilge’s dictionary under merry. Where it appears with an exclamation mark, as a thing said rather than written. The fuller traditional form, Nollaig faoi shéan agus faoi mhaise duit, sits beside it in the same entry.