Did Jesus or his companions celebrate Chirstmas?
Of course not. If Jesus (peace be upon him) meant his people to celebrate Christmas, he would have practiced it himself and enjoined it on his followers. Even the 'supposed pseudo-companions' of Jesus mentioned in the Bible made many innovations in their religion, but celebrating Christmas was not their endeavor.
"In fact, the Church did not observe a festival for the celebration of the event until the 4th century".
(Grolier's Encyclopedia)
Even if Christianity passed the above two test, they still have to prove that their Bible have remained unaltered since its revelation.
We'll mention three brief points:
(1) Bible, unlike our Qur’an, was not written down during Jesus' lifetime and no evidence of it ever being memorized.
(2) The oldest Bible (Codex Siniticas) in possession of Christendom is only from the 4th century C.E.
(3) Verses are missing or added as to the Bible throughout the centuries. Compare different Bible versions (Example, compare the King James Version with Revised Standard Version. For verse: 1 John 5:7, this verse is missing in Revised Standard Version published in 1952).
How unfortunate and pitiful: Parts of the original Bible has been lost. Part surviving has been corrupted and the corrupted parts have been misinterpreted.