The history of Christmas dates back over 4000 years。 Many of our Christmas traditions were celebrated centuries before the Christ child was born。 The 12 days of Christmas， the bright fires， the yule log， the giving of gifts， carnivals(parades) with floats， carolers who sing while going from house to house， the holiday feasts， and the church processions can all be traced back to the early Mesopotamians。
Many of these traditions began with the Mesopotamian celebration of New Years。 The Mesopotamians believed in many gods， and as their chief god-Marduk。 Each year as winter arrived it was believed that Marduk would do battle with the monsters of chaos。 To assist Marduk in his struggle the Mesopotamians held a festival for the New Year。 This was Zagmuk， the New Years festival that lasted for 12 days。
The Persians and the Babylonians celebrated a similar festival called the Sacaea。 Part of that celebration included the exchanging of places， the slaves would become the masters and the masters were to obey。 The ancient Greeks held a festival similar to that of the Zagmuk/Sacaea festivals to assist their god Kronos who would battle the god Zeus and his Titans。
The Romans celebrated their god Saturn。 Their festival was called Saturnalia which began the middle of December and ended January 1st。 With cries of “Jo Saturnalia！” the celebration would include masquerades in the streets， big festive meals， visiting friends， and the exchange of good-luck gifts called Strenae (lucky fruits)。 The Romans decked their halls with garlands of laurel and green trees lit with candles。 Again the masters and slaves would exchange places。
“Jo Saturnalia！” was a fun and festive time for the Romans， but the Christians thought it an abomination to honor the pagan god。 The early Christians wanted to keep the birthday of their Christ child a solemn and religious holiday， not one of cheer and merriment as was the pagan Saturnalia。
Some legends claim that the Christian “Christmas” celebration was invented to compete against the pagan celebrations of December。 The 25th was not only sacred to the Romans but also the Persians whose religion Mithraism was one of Christianitys main rivals at that time。 The Church eventually was successful in taking the merriment， lights， and gifts from the Saturanilia festival and bringing them to the celebration of Christmas。
The exact day of the Christ childs birth has never been pinpointed。 Traditions say that it has been celebrated since the year 98 AD。 In 137 AD the Bishop of Rome ordered the birthday of the Christ Child celebrated as a solemn feast。 In 350 AD another Bishop of Rome， Julius I， choose December 25th as the observance of Christmas。
The birth of Jesus had a story: In Nazareth， a city of Galilee。 The virgins name was Mary was betrothed to Joseph。 Before they came together， she was found with child of the Holy Spirit。 Joseph her husband was minded to put her away secretly。 While he thought about these things， Gabriel， an angel of the Lord appeared to him in a dream and told him did not be afraid to take Mary as wife。 And Mary will bring forth a Son， and he shall call his name， Jesus， for he will save his people from their sins。
Before Jesus births， Joseph and Mary came to Quirnius was governing Syria。 So all went to be registered， everyone to his own city。 Joseph also went up out of Galilee， out of the city of Nazareth， into Judea， to the city of David， which is called Bethlehem， because he was of the house and of the lineage of David， to be registered with Mary， his betrothed wife， who was with child。 So it was that while they were there， the days were completed for her to be delivered。 And she brought forth her firstborn Son， and wrapped him in swaddling cloths， and laid him in a manger， because there was no room for them in the inn。
And that， Christmas is the feast of the nativity of Jesus， is on 25th， December every year。 But nobody knows the actual birthday of Jesus。 And the Christmas has become popular when Christmas cards appeared in 1846 and the concept of a jolly Santa Claus was first made popular in nineteenth Century。
The custom of giving gifts to relatives and friends on a special day in winter probably began in ancient Rome and northern Europe。 In these regions， people gave each other small presents as part of their year-end celebrations。
In the 1800s， two more Christmas customs became popular--decorating Christmas trees and sending Christmas cards to relatives and friends。 Many well-known Christmas carols， including ``Silent Night“ and ``Hark！ The Herald Angels Sing，” were composed during this period。 In the United States and other countries， Santa Claus replaced Saint Nicholas as the symbol of gift giving。
The word Xmas is sometimes used instead of Christmas。 This tradition began in the early Christian church。 In Greek， X is the first letter of Christs name。 It was frequently used as a holy symbol。
这是英文版的 圣诞的来历，下面把翻译也写在下面，你可以对照着适当删减用。
圣诞节是基督教世界最大的节日。4世纪初，1月6日是罗马帝国东部各教会纪念耶稣降生和受洗的双重节日、称为“主显节”Epiphany，亦称“显现节”即上帝通过耶稣向世人显示自己。当时只有耶路撒冷的教会例外，那里只纪念耶稣的诞生而不纪念耶稣的受洗。
后来历史学家们在罗马基督徒习用的日历中发现公元 354年12月25日页内记录着：“基督降生在犹大的伯利恒。”经过研究，一般认为12月25日作为圣诞节可能开始于公元336年的罗马教会。12月25 日原来是波斯太阳神（即光明之神）密特拉（Mithra）的诞辰，是一个异教徒节日，同时太阳神也是罗马国教众神之一。这一天又是罗马历书的冬至节，崇拜太阳神的异教徒都把这一天当作春天的希望，万物复苏的开始。可能由于这个原因，罗马教会才选择这一天作为圣诞节。这是教会初期力图把异教徒的风俗习惯基督教化的措施之一。后来，虽然大多数教会都接受12月25日为圣诞节，但又因为各地教会使用的历书不同，具体日期不能统一，于是就把12月24日到第二年的 1月6日定为圣诞节节期（Christmas Tide），各地教会可以根据当地具体情况在这段节期之内庆祝圣诞节。
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