* Cuneiform was used for ancient Mesopotamian languages, not for the languages from which "Merry Christmas" comes. The concept of Christmas is rooted in Christianity, which emerged long after cuneiform went out of use.
* The idea of Christmas itself wouldn't have been familiar in ancient Mesopotamia. They had different religious beliefs and practices.
* Cuneiform is a logographic system, meaning symbols represent words or concepts, not letters. While it's possible to translate "Merry Christmas" into individual words using cuneiform, you wouldn't be able to find a single, established phrase that directly corresponds to the greeting.
However, if you wanted to convey a similar sentiment of good wishes during a festive time, you could use cuneiform to translate:
* "May you have a good festival." This could be expressed using words like "festival" (𒀀𒀀𒉌, "akitu") and "good" (𒅎, "dumu").
* "May you have a good year." This could be expressed using words like "year" (𒀀𒀀𒉌, "šat") and "good" (𒅎, "dumu").
Keep in mind that these translations would reflect the broader idea of good wishes and prosperity, not specifically the Christian holiday of Christmas.