The consensus of scholars is that both gospels were written about AD 75-85, and while it is possible that one account might be based on the other, or that the two share common source material, the majority conclusion is that, in respect of the nativity story, the two are independent of each other.
In Christian theology the nativity marks the birth of Jesus in fulfillment of the divine will of God, to save the world from sin. The artistic depiction of the nativity has been an important subject for Christian artists since the 4th century. Artistic depictions of the nativity scene since the 13th century have emphasized the humility of Jesus and promoted a more tender image of him, as a major turning point from the early "Lord and Master" image, mirroring changes in the common approaches taken by Christian pastoral ministry.
Christians of the Eastern Orthodox Church and Oriental Orthodox Church observe a similar season, sometimes called Advent but also called the "Nativity Fast", which begins forty days before Christmas. Some Eastern Orthodox Christians (e.g. Greeks and Syrians) celebrate Christmas on December 25. Other Orthodox (e.g. Copts, Ethiopians, Georgians, and Russians) celebrate Christmas on (the Gregorian) January 7 (Koiak 29 on coptic calendar) as a result of their churches continuing to follow the Julian calendar, rather than the modern day Gregorian calendar.
The date of birth for Jesus of Nazareth is not stated in the gospels or in any secular text, but a majority of scholars assume a date between 6 BC and 4 BC. The historical evidence is too ambiguous to allow a definitive dating, but the date has been estimated through known historical events mentioned in the Gospels of Luke and Matthew or by working backwards from the estimated start of the ministry of Jesus. Luke 2:1 states that Jesus was born when "Caesar Augustus issued a decree that a census should be taken of the entire Roman world. This was the first census that took place while Quirinius was governor of Syria." All that is generally accepted is that Jesus was born before 4 BC, the year of Herod's death.