它源自古罗马人迎接新年的农神节，与基督教本无关系。在基督教盛行罗马帝国后，教廷随波逐流地将这种民俗节日纳入基督教体系，同时以庆祝耶稣的降生。但在圣诞节这天不是耶稣的生辰，因为《圣经》未有记载耶稣具体生于哪天，是基督教吸收了古罗马神话的结果。
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, also known as Christmas, is translated as "Christ Mass", which originated from the Lunar New Year celebrations of ancient Romans and has nothing to do with Christianity. After the popularity of Christianity in the Roman Empire, the Holy See drifted this folk festival into the Christian system to celebrate the birth of Jesus.
But it is not Jesus'birthday on Christmas Day, because the Bible does not record when Jesus was born, nor does it mention such a festival, which is the result of the absorption of ancient Roman mythology by Christianity.
Most Catholic Churches celebrate Christmas on Christmas Eve on December 24, or midnight Mass in the early morning of December 25, while some Christian Churches celebrate Christmas on December 25. Another major branch of Christianity, the Orthodox Church, celebrates Christmas on January 7 each year.
中文：圣诞节是西方的传统节日，是庆祝基督教创始人耶稣诞生的节日。教会先在12月24日的平安夜，也就是12月25日凌晨举行子夜弥撒，来庆祝耶稣的降临，因此也称为“耶诞节”。所以圣诞节是一个宗教性的节日。
英文：Christmas is a traditional Western festival, celebrating the birth of Jesus, the founder of Christianity.
the church first celebrates the coming of Jesus by holding midnight mass on Christmas Eve on December 24, that is, in the early morning of December 25, so it is also called "Christmas". So Christmas is a religious holiday.
当圣母玛丽亚快要临盆时，罗马政府下命令要全体人民到伯利恒申报户籍。当玛丽亚到达伯利恒时天色已晚，两人未能找到旅馆住宿，唯有一个马棚可以栖身。在这晚，玛丽亚在马棚中生下了圣子耶稣。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。