"CHRIST IS BORN: REJOICE!"
Another distinctive of the Eastern churches is that those who are on the "old calendar" celebrate the birth of Christ on a different day than those in the Western tradition. This is because their ecclesiastical year is based on the Gregorian, rather than the Julian, calendar. The Orthodox churches are generally classified into two categories, "Eastern" and "Oriental." Most of the divisions within these categories are along national lines, thus we have Russian Orthodox, Greek Orthodox and so on. The Oriental Orthodox Christmas Eve is on January 6th, and some Armenian churches will celebrate Christmas on January 19th.
COPTS IN THE NEWS TODAY
Today the Coptic churches (in Europe, as well as in Egypt) are the targets of Radical Islamic jihadists, who have vowed to "destroy the cross" by blowing up churches, especially when they are full of worshippers during Christmas services. Some observers see this as part of a more extensive enterprise involving other Christian churches as well as Jews. The jihadists first want to see how the West reacts to the bombings. See the article on the Cranmer blog: