I agree completely about the commercialisation of Christmas, but as I have considered this over the last 24 hours I find I rather think that there is a need for the Church to fight back to find a place for the Christian message rather than leave the field. Most folk in the UK will not be participating in an OC Nativity, but there is a tremendous opportunity at the time of the NC Nativity. My local orthodox Anglican church is packed at all the services of the eve of the Nativity.
It seems to me that an Orthodox based service of carols and traditional Orthodox Nativity hymns, with a real Gospel message, would be welcomed and attended at NC Christmas when hearts are open, while the OC celebration has the possibility of only being known by those who know.
This isn't a criticism of any particular date at all, but in the UK the rest of the population run on the Gregorian calendar, it seems to me that it can't just be ignored from a missionary point of view.
Likewise should I seek to bring an Orthodox pov to bear on our celebration of St George, or should I leave that celebration to the non-Orthodox and quietly have my own celebration on the OC when the press aren't interested and the opportunity for witness is lost.
This is not an OC/NC post, but I'm just raising the missiological possibilities of participating as a witness in the NC if that is the calendar in use around us.
An Orthodox choir might be invited to sing in a shopping mall at NC Christmas, but who's going to invite them 13 days after Christmas?