For all you Atheists that like having a tree up in December fear not Christmas trees are what theists put up in december Wikipedia has a good article on it and this is the introducty two paragraphs from it. The Christians commandeered what was a pagan religious festival!
Yule or Yuletide ("Yule-time") is a winter festival that was initially celebrated by the historical Germanic people as a pagan religious festival, though it was later absorbed into, and equated with, the Christian festival of Christmas. The festival was originally celebrated from late December to early January on a date determined by the lunar Germanic calendar. The festival was placed on December 25 when the Christian calendar (Julian calendar) was adopted. Scholars have connected the celebration to the Wild Hunt.
Terms with an etymological equivalent to "Yule" are used in the Nordic Countries for the Christian Christmas (with its religious rites), but also for other holidays of the season. Yule is also used to a lesser extent in English-speaking countries to refer to Christmas. Customs such as the Yule log, Yule goat,Yule boar, Yule singing, and others stem from Yule. The fact that Yule is not etymologically tied to Christianity means Yule in the Nordic Countries is also celebrated by many non-Christians and even by the non-religious. The non-religious treat Yule as an entirely secular tradition. A number of Neopagans have introduced their own rites.
The link to the wikipedia entry is here:- http://en.wikipedia.org/wiki/Yule
The Orthodox churches hold Christmas day on the 12 of January! But they put the tree up in December!
It is a Yule tree!