Honestly, it does. Most of our modern Holidays coincide very closely with many Pagan (and largely Celtic) holidays.

I think that Christmas was based to 'replace' the Winter Solstice. Lemme see if I can grab Wikipedia's entry on Yule, I think it supports this as I've read about it in various books...

http://en.wikipedia.org/wiki/Yule#Co...dern_Christmas

If you check other holidays, the dates line up pretty accurately.