Well, this post is maybe not really an atheistic one, but I think, it could interest you anyway.
I even couldn't trust my eyes when I went home from work today. In the Bern central station, they already hung up Christmas decoration!
If found some more pictures in this
Though I'm an atheist, I usually don't feel harassed by Christmas decoration/shows/dinners/whatever. But in july, I DO. :-)
But maybe it's just a sort of marketing joke or something like this. Or perhaps because it was very cold last week. :-)