[tjwmason]

Greek Orthodox Old Calendar celebrate January 7th.
Why the different dates? Just curious. I never heard of the 6th until recently.

The Julian (or Old) Calendar is 13 days out from the Gregorian (or New), thus the Julian Calendar has 25 December on the day considered by most to be the 7 January. Epiphany is a separate, though related, feast on the 12th day of Christmass. I believe that the Greek Orthodox have the feast of the Theophany of Christ on 12th Day (which is 6 January Old Calendar, 19 January New Calendar).

There is some confusion between these two feasts given that Julian Christmass bumps into (as it were) Gregorian Epiphany.

[visualops]

That explains it, thanks. I spent 10+ years in the Old calendar Greek Orthodox and we always celebrated on the 7th (and on the 25th somewhat too- to please the kids). I've since returned to the Roman Catholic Church, and the "new" calendar.