Already at the time of the Celts (between 2000 and 1200 BC), a tree was erected on December 24th, the day that they associated with the rebirth of the sun. Because it was already customary to associate a tree to each lunar month, they dedicated the spruce fir (that was the ‘tree of childbirth’) to this day. In fact, before the Christmas holiday existed, there were Pagan rituals during winter solstice: they decorated a tree, symbol of life, with fruit, flowers and wheat.

Where does the word Christmas come from: The word "Christmas" is a combination of the words "Christ" and "Mass." The word "Mass" means death and was coined originally by the Roman Catholic Church. The ritual of the Mass involves the death of Christ, and the distribution of the "Host", In short, Christmas is a Roman Catholic word of Roman Empire origin.

It is in the 4th Century (in 354) that the church established the celebration of the birth of Jesus Christ by Nativity. They selected the date December 25th to rival with and replace the Pagan celebration that was celebrated on that day, Sol Invictus after the Cult of Mithra*. (Because of the popularity of this Celtic god, in 274 the roman emperor Aurelien had declared his Cult as state religion to be celebrated on December 25th). Initially the celebration of Christmas was simply a mass to celebrate the birth of Jesus, because a theologian said "we celebrate this day, not to honor the sun like the Pagans do, but to honor the sun’s creator".

There is also a story about a German monk at the end of the 7th Century, the legend is as follows:

Saint Boniface (Born in 680) was a monk missionary that wanted to convince German druids in the Geismar region that the oak tree was not a sacred tree. He chopped down the oak tree. "In falling the tree smashed everything in its passage except a small spruce tree" From this moment on, the legend survived. According to the legend, Saint Boniface had transformed this pure coincidence into a miracle, and because he was preaching nativity, he took advantage of the situation to declare: “From now on we will call this tree, the tree of infant Jesus.” Since then in Germany, young spruce trees are planted to celebrate the birth of Jesus Christ.