Christmas (literally, the Mass of Christ) is a traditional holiday celebrating the birth of Jesus with both religious and secular aspects, commonly observed on 25 December.
In most Eastern Orthodox Churches, even where the civil calendar used is the Gregorian, the event is observed according to the Julian calendar, which coincides with the predominant reckoning of 7 January.
Celebrated mostly by Christians, the holiday is based on the traditional ,though not accurate,birth of Jesus, as 25 December. Recent data has concluded that Jesus was likely born earlier, circa 8 BC to 2 BC,
not to mention at a different time of year. Christ's birth, or nativity, was said by his followers to fulfill the prophecies of Judaism that a messiah would come, from the house of David, to redeem the world from sin.
Efforts to decide upon a date on which to celebrate his birth began some centuries later.
