Christmas is the world"s largest Christian festival。 4 of the century， January 6 is the Roman Empire， the eastern churches to commemorate the birth of Jesus and the baptism of the double festival， known as "Epiphany" (also known as "Epiphany")， that is God himself through Jesus Christ to the world。 The exception was only the church in Jerusalem， where only the commemoration of the birth of Jesus rather than to commemorate the baptism of Jesus。 Later Christian historians in Rome， learning to use the calendar found in AD 354 December 25 recorded on page: "Christ was born in Bethlehem of Judah。"

After the study， is generally believed that December 25 for Christmas， may begin in the year 336 AD， the Church of Rome， about AD 375 years spread to Asia Minor to Antioch， AD 430 spread to Egypt， Alexandria， Jerusalem， the Church was accepted at the latest， but the Armenian church is still adhere January 6 Epiphany of Jesus"s birth。

December 25 was originally Persian sun god (the god of light) the birthday of Mithra， a pagan holiday， at the same time the state religion of the Roman sun god is also one of the gods。 On this day the Roman calendar is the Winter Solstice festival， worship the sun god of the pagans are this day as the spring of hope， the beginning of recovery in all things。 May be due to this reason， the Church of Rome before choosing this day as Christmas。 This is a try to turn the pagan customs of the early Church， the Christian-oriented measures。 Later， while most churches have accepted December 25 for Christmas， but solid for use throughout the church calendar is different from the specific date is not uniform， so put December 24 to January 6 next year， as Christmas steadily period， the local churches according to specific local conditions during this period within the celebration of Christmas Day。 Since the December 25 by a majority of the church recognized after Christmas， the original of the January 6 Epiphany on the memory of the baptism of Jesus， but the Catholic Church again January 6 as "Three Kings come to North Korea"s Day" to commemorate the Jesus， because when the East Three Kings (ie， three Ph。D。) to worship story。

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With the widespread dissemination of Christianity， Christmas has become an inter-denominational Christian， and even the general masses is an important non-Christian holiday。 Many countries in Europe and America， people attach great importance to this festival， put it and New Year"s together， but with a grand celebration of the excitement far beyond the New Year has become a national holiday。 December 25 with the main celebration of the legends of the birth of Jesus。 From December 24 to January 6 next year for the Christmas holiday season。 During the holiday season， national long Christians have been held 。