On the Origins of Christmas

More complicated than almost anyone thinks:

The word for Christmas in late Old English is Cristes Maesse, the Mass of Christ, first found in 1038, and Cristes-messe, in 1131. In Dutch it is Kerstmis, in Latin Dies Natalis, whence comes the French Noël, and Italian Il natale; in German Weihnachtsfest, from the preceeding sacred vigil. The term Yule is of disputed origin. It is unconnected with any word meaning "wheel". The name in Anglo-Saxon was geol, feast: geola, the name of a month (cf. Icelandic iol a feast in December).

Christmas was not among the earliest festivals of the Church. Irenaeus and Tertullian omit it from their lists of feasts; Origen, glancing perhaps at the discreditable imperial Natalitia, asserts (in Lev. Hom. viii in Migne, P.G., XII, 495) that in the Scriptures sinners alone, not saints, celebrate their birthday; Arnobius (VII, 32 in P.L., V, 1264) can still ridicule the "birthdays" of the gods.

The first evidence of the feast is from Egypt...