The Romans celebrated the solstice today, December 25. (Today this is when the days begin to grow visibly longer, but their date was probably based on the true solstice in the Julian calendar.) It became Dies Natalis Solis Invicti, Day of Birth of the Unconquered Sun. This festival celebrated the sun god, Deus Sol Invictus - a inclusive concept that covered the agrarian Roman god Sol Indiges, the god Sol (sometimes Sol Invictus) who was promoted by Emperor Aurelian, the rising sun Oriens, the Syrian god El-Gabal, the Persian god Mithras, and possibly that upstart Jesus Christus, whose church decided to separately celebrate his birth this day.
Wishing you all a joyous and bright Dies Natalis Solis Invicti, or Cristes mæsse (old English) if you prefer. Also enjoyment of your
pagan tree, gifts, gingerbread, poisonous hemi-parasitic mistletoe, and eggnog (or lait de poule, hen's milk, as the French call it - long known as a cold remedy), as relevant.