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 Christ´s name. It was frequently used as a holy symbol.
“圣诞节”这个名称是“基督弥撒”的缩写。弥撒是教会的一种礼拜仪式。耶诞节是一个宗教节。我们把它当作耶稣的诞辰来庆祝，因而又名耶诞节。这一天，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。
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。
随着基督教的广泛传播，圣诞节已成为各教派基督徒，甚至广大非基督徒群众的一个重要节日。在欧美许多国家里，人们非常重视这个节日，把它和新年连在一起，而庆祝活动之热闹与隆重大大超过了新年，成为一个全民的节日。
12月25日的主要纪念活动都与耶稣降生的传说有关。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。当马利亚快要临盆的时候，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借宿，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，便把十二月二十五日定为圣诞节，纪念耶稣的出世。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，圣诞节也开始流行起来了。
关于圣诞节英语资料: I like christmas
I like christmas because on Christmas morning! Children like to wake up early while it's still dark and sneak into the living room to check the presents----find any with their name on it, shake them to guess what's inside, and then maybe they'll go back to bed and pretend they are still asleep when their parents come to wake them with a "Merry Christmas!" But almost no one I know gets completely dressed or eats a regular breakfast first thing Christmas morning. They just put on a robe or wear their pajamas and go to see what's under the Christmas tree. Some Christian families have a tradition of reading the Bible story of Jesus' birth. Maybe it's to remind the children that Christmas is Jesus' birthday. Someone will begin to take the presents out from under the tree, see whose name is on the package, and then pass them around. Some families wait until all the presents have been given out before opening any of them, while others open each one as it comes to them. There are many "thank you" to the ones who gave the gifts, new clothes are tried on to see if they fit, and of course the most interesting toys will immediately be played with. Usually among the Christmas gifts will be some especially delicious candy or cake or cookies which everyone tastes. These sweet things may be the only breakfast many people eat Christmas morning. After the gifts have been opened, the room will be tidied up except where the children are playing with their toys. Everyone will wash and get dressed for the day. Some people may go to a Christmas morning church service around ten o'clock if their church didn't have one on Christmas Eve. But most people will just watch TV. Well, most men will. The children may play outside or inside with their new toys, but the mothers will be in the kitchen preparing Christmas Dinner.
圣诞节英文资料:Christmas
Christmas is a Christian holiday held on December 25 which celebrates the birth of Jesus Christ. Eastern Orthodox Churches, which use the Julian Calendar to determine feast days, celebrate on January 7 by the Gregorian Calendar. Both dates are merely traditional and neither is thought to be the actual birthdate of Jesus. Christ's birth, or nativity, is said to fulfill Old Testament prophecies concerning the coming of a messiah, or savior.The word Christmas is derived Middle English Christemasse and from Old English Cristes mæsse.[1] It is a contraction meaning "Christ's mass". The name of the holiday is often shortened to Xmas because Roman letter "X" resembles the Greek letter Χ (chi), an abbreviation for Christ (Χριστός).In Western countries, Christmas has become the most economically significant holiday of the year. The popularity of Christmas can be traced in part to its status as a winter festival. Many cultures have their most important holiday in winter because there is less agricultural work to do at this time. Examples of winter festivals that are believed by some to have influenced Christmas include the pre-Christian festivals of Yule and Saturnalia.In Western culture, the holiday is characterized by the exchange of gifts among friends and family members, some of the gifts being attributed to Santa Claus (also known as Father Christmas, Saint Nicholas, and Father Frost). However, various local and regional Christmas traditions are still practiced, despite the widespread influence of American, British and Australian Christmas motifs disseminated by film, popular literature, television, and other media.