The legend

The legend says that when the first autumn came in the world, all the birds hurried to go to warmer lands. One was left alone: ​​a small and scrawled bird on a branch at the edge of the codru. She had a poor, broken wing and could not fly too much. He went to ask for the help of a tree, because he had roots that he would not go anywhere and know how to cope with the cold and the cold of winter. He first went to the oak, seeing him more prominently:

• Please beautify, let me live among your branches, for winter comes and I will die without shelter!
  "I can not," said the oak. I do not want to do it to me,
  eat the acorns. Look for your way!
  He went to the beard, but he also did not endeavor to offer him accommodation:

"I'm sorry," said the beagle, "but I've got a lot of worry and winter will be tough. I can not help you.
And so on, from one tree to another ... The pestilence did not even know where to go when, passing by the fir tree, she heard her wonder and joy:

• Well, pussy, stop barking! If you want, stay with me. You can sit on any of my branches and together a man passes over and over the coming winter!
  Rejoicing, the bird soon grew a couch on one of the branches of the tree. And even that night the cold wind began to blow. Palide, one by one, the leaves of the trees fell to the ground. Only the leaves of the tree remained green, and they were all so amazed. And the wind was greatly surprised, and then he went and waited even to the Good God:
• God, let me shake the tree leaves as well as all the trees ...
  "No," God replied. Fir did not do anything to him, for he was good with a poor little bird. Do not touch it!
  And since then, my dear, the tree always keeps its green leaves, either summer or winter.

source:https://www.ziuaconstanta.ro/stiri/social/arbore-sfant-ce-ramane-vesnic-verde-de-unde-au-mostenit-romanii-traditia-impodobirii-bradului-de-craciun-526008.html