same what mineistaken said, but we put the tree up at 24th, day later. it is christians tradition, to put up the tree at 24th, or 23rd? always, period! not sure why people are putting it up now, but sure it is mostly in usa, where they really dont know nothing about traditions, as it looks like

consumerist society, shopping and hunting for gifts are on the first place

but nothing against it, depends on younger years, if you never got it traditionally, why to do it now

you have a very nice tree and place anyway zuzana, congrats!
