"Christmas" the name is "the word of Christ. Mass" A mass is a form of worship. Christmas is a religious festival. We take it as the birthday of Jesus, and to celebrate Christmas. This day, all over the world in Christian churches all special worship. But there are many Christmas festivities and religious and has no relevance. Exchanging gifts and sending Christmas CARDS, the Christmas day celebrate Christmas.
Jesus' birth is a story, he is by the holy spirit, born of the virgin Mary. God sent messengers add more to Joseph in a dream job, that he don't because Mary and her unmarried pregnancy with her, instead, the boy named "Jesus", meaning is to he rescued the people from sin.
When Mary was linpan, Roman government under the command, all people to Bethlehem must declare household. When Joseph and Mary had to obey.
When they reached Bethlehem, it was already, but they failed to find out that only a hotel accommodation crossing horses may transients. At this moment, Jesus to be born! Then Mary only in a manger, gave birth to Jesus. Later generations to commemorate the birth of Jesus, he decided to Christmas on December 25 every year, mass, to remember Jesus was born.
Christmas is on December 25th commemorate the birth of Jesus, but real birth, no one knows. In the nineteenth century, the popular Christmas CARDS, Santa Claus, Christmas also began to appear.
【翻译】：
“圣诞节”这个名称是“基督弥撒”的缩字。弥撒是教会的一种礼拜仪式。耶诞节是一个宗教节。我们把它当作耶苏的诞辰来庆祝，因而又名耶诞节。这一天，全世界所有的基督教会都举行特别的礼拜仪式。但是有很多圣诞节的欢庆活动和宗教并无半点关联。交换礼物，寄圣诞卡，这都使圣诞节成为一个普天同庆的日子。
耶稣的出生是有一段故事的，耶稣是因着圣灵成孕，由童女马利亚所生的。神更派遣使者加伯列在梦中晓谕约瑟，叫他不要因为马利亚未婚怀孕而不要她，反而要与她成亲，把那孩子起名为“耶稣”，意思是要他把百姓从罪恶中救出来。
当马利亚快要临盘的时候，罗马政府下了命令，全部人民到伯利恒务必申报户籍。约瑟和马利亚只好遵命。
他们到达伯利恒时，天色已昏，无奈两人未能找到旅馆渡宿，只有一个马棚可以暂住。就在这时，耶稣要出生了！於是马利亚唯有在马槽上，生下耶稣。后人为纪念耶稣的诞生，便定十二月二十五为圣诞节，年年望弥撒，纪念耶稣的出世。
圣诞节便是於十二月二十五日纪念耶稣的诞生，但真实的诞生日就没有人知道了。十九世纪，圣诞卡的流行、圣诞老人的出现，圣诞节亦开始流行起来。
英文：
Church began, there is no Christmas, about hundred years after Jesus went to heaven to have said: the first Christmas day is in AD 138, the saint kerry gate proposes by the bishop of Rome held while the church history carries the first Christmas in the year 336 due to the bible is unknown to remember Jesus to be born, so different around Christmas date until 440 AD, only by the Vatican set December 25 for Christmas in A.D.
1607, the world church leader got together in Bethlehem, further to determine, from then on, the world's most christians are in December 25 for Christmas In fact, which day is not important, it is important to know that it is to commemorate the birth of Jesus Christ.
中文：
教会开始并无圣诞节，约在耶稣升天后百余年内才有。据说：第一个圣诞节是在公元138年，由罗马主教圣克里门倡议举行。而教会史载第一个圣诞节则在公元336年。由于圣经未明记耶稣生于何时，故各地圣诞节日期各异。
直到公元440年，才由罗马教廷定12月25日为圣诞节。公元1607年，世界各地教会领袖在伯利恒聚会，进一步予以确定，从此世界大多数的基督徒均以12月25日为圣诞节。其实哪一天并不要紧，重要的是应该知道它是为纪念救主耶稣降生。
圣诞节的由来的英语翻译是The origin of Christmas.
下面是圣诞节的由来的具体英语解释。
It is said that Jesus was conceived by the Holy Spirit and was born of the virgin Mary. God also sent the messenger Gabriel to speak to Joseph in a dream, telling him not to leave Mary because she was unmarried and pregnant, but to marry her and name the child "Jesus," meaning that he might save the people from their sins. When Mary was about to give birth, the Roman government ordered all the people to declare their household registration when they went to Bethlehem. Joseph and Mary had to obey. When they arrived in Bethlehem, it was already dark, but the two could not find a hotel and had only one stable to stay in. Just then, Jesus was about to be born. So Mary gave birth to Jesus in the manger. In order to commemorate the birth of Jesus, future generations designated December 25 as Christmas, looking at Mass every year to commemorate the birth of Jesus.
The Origin of Christmas Christmas Day-December 25-which celebrates the birth of Jesus Christ, the founder of the Christian religion, is the biggest and best-loved holiday in the United States.
圣诞节（Christmas）又称耶诞节、耶稣诞辰，译名为“基督弥撒”，是西方传统节日，起源于基督教，在每年12月25日。弥撒是教会的一种礼拜仪式。圣诞节是一个宗教节，因为把它当作耶稣的诞辰来庆祝，故名“耶诞节”。
大部分的天主教教堂都会先在12月24日的平安夜，亦即12月25日凌晨举行子夜弥撒，而一些基督教会则会举行报佳音，然后在12月25日庆祝圣诞节；基督教的另一大分支——东正教的圣诞节庆则在每年的1月7日。
Christmas Day-December 25-which celebrates the birth of Jesus Christ, the founder of the Christian religion, is the biggest and best-loved holiday in the United States.
According to the Bible, the holy book of Christians, God decided to allow his only son, Jesus Christ, to be born to a human mother and live on earth so that people could understand God better and learn to love God and each other more. "Christmas"- meaning "celebration of Christ "- honors the time when Jesus was born to a young Jewish woman Mary.
Mary was engaged to be married to Joseph, a carpenter, but before they came together, she was found to be with child. Because Joseph, her husband, was a righteous man and did not want to expose her to public disgrace, he had in mind to divorce her quietly. But after he had considered this, an angel of the Lord appeared to him in a dream and said, "Do not be afraid to take Mary home as your wife, because what is conceived in her is from the Holy Spirit. She will give birth to a son, and you are to give him the name Jesus, because he will save his people from their sins."
Although the exact date of the birth of Jesus nearly 2,000 years ago is not known, the calendar on the supposed date divides all time into B.C. (Before Christ )and A.D. ( a Latin phrase, Anno Domini, "in the year of our Lord.")For the first 300 years, Jesus' birthday was celebrated on different dates. Finally, in the year 354, church leaders chose December 25 as his birthday.十二月二十五日圣诞节的起源圣诞节庆祝耶稣基督的诞生,是基督教的创始人,是美国最大、最受人喜爱的节日。根据圣经,基督教的圣书,上帝决定让他的独生子耶稣基督出生,母亲是人类,生活在地球上,以便人们能更好地了解上帝,学习热爱上帝和彼此更多。“圣诞节”——意思是“庆祝基督”——纪念耶稣诞生的时候,一个年轻的犹太妇女玛丽。玛丽约瑟夫订婚,一个木匠,但他们同居之前,约瑟夫发现她和孩子。约瑟夫,因为她的丈夫是一个正派的人,又不想把这件事说出去让她丢脸,所以他想悄悄地和她分手。但他认为这后,耶和华的使者在梦中似乎他,说:“不要害怕把玛丽带回家作为你的妻子,因为她怀孕的是圣灵。她将生下一个儿子,你要给他起名叫耶稣,因为他将从罪恶中拯救人们。“虽然耶稣的出生的确切日期近2000年前还不知道,应该上的日历日期将所有时间划分为公元前公元(公元前)和(拉丁短语,老年,“我们的主。”)300年第一,庆祝耶稣的生日是在不同的日期。最后,在354年,教会领袖选择12月25日定为耶稣基督的生日。本回答被网友采纳