I got the Chrisma-Hauna-Kwans-ka thing from a stupid commercial on TV. I don't even remember what the commercial was about.
And it is true that with out Christ, there would be no Christmas, and no family oriented holiday. But there ain't no way possible for Jesus to have been born on December 25th. He was more than likely born in September, or maybe even October, but not December.
I haven't done any real research to pinpoint the exact date to my own satisfaction, but I wouldn't be surprized to find that he was born on the Day of Atonement.
The only reason I say that, and it's not a big issue to me, is that it is recorded that Jesus was 33 and a half when He was crucified. And we can pinpoint the date of His crucifixion. At least as far as what day of what month. He couldn't have been born in December. But that is not the only bit of evidence on this debate.