Well, since there is no reliable proof that Jesus ever existed, the date of his birth (or conception) is not exactly high on my list of things to be concerned about.

Christmas has been a primitive pagan holiday since people started worshiping the sun, which was almost from the very beginning.

When the days got short in winter, they were afraid the sun would go and never return, so they lit huge fires to encourage the sun and, sure enough, the days started getting longer again.

This developed into the Solstice Celebration, featuring big feasts and revelry with bonfires and torches to bring light and help people get through the worst part of winter.

The Roman Christians simply jumped in along the way and called it Christmas.

It is good to examine these things and understand their foundations (which are often flimsy).