According to Ernest Martin, former WCG minister, the time of Jesus' birth is the 11 September not the 25 December. Christmas day is thought by Ernest Martin to be the day of conception, not the birth. Ernest Martin is the founder of Associates for Scriptural Knowledge. Garner Ted Armstrong also holds out 25 December is the day of Jesus' conception according to historical sources. Listen to Garner Ted Armstrong's sermon on The Real Birthday of Christ from the sermon page of his church.
Chapter 5: The Time of Jesus' Birth
The Exact Day of Jesus’ Birth
The apostle John is presenting to his readers something of profound significance in a symbolic way. Revelation 12:1–3 shows a New Moon day that could only be observed from earth just after sunset, and the day was September 11th. This fits well with Luke’s description of the birth of Jesus in Bethlehem. Recall that,
“there were in the same country shepherds abiding in the field, keeping watch over the flock by night ... and the angel said ... unto you is born this day [which began at sundown] in the city of David a Savior, which is Christ the Lord.”
Jesus was born in early evening, and Revelation 12 shows it was a New Moon day.
What New Moon could this have been? The answer is most amazing. It is almost too amazing! September 11, 3 B.C.E. was Tishri One on the Jewish calendar. To Jewish people this would have been a very profound occasion indeed. Tishri One is none other than the Jewish New Year’s day (Rosh ha-Shanah, or as the Bible calls it, The Day of Trumpets ― Leviticus 23:23–26). It was an important annual holy day of the Jews (but not one of the three annual festivals that required all Palestinian Jews to be in Jerusalem).