Ahh, that is the big question that plagues many a tree-putter-upper-er across the globe. When do you put up that darn old tree?
Well, I guess it depends on where you come from, what your family does and what's considered normal for you, and what you feel like doing.
For myself, I think that the 1st December is a great date for putting decorations up. Just because that's what I've always done, so it's normal. Any earlier would just be weird!! You'd start turning into the shopping centres who have them out in October!
For other cultures, for example England, many trees would go up around 12 days before Christmas (hence, the 12 days of Christmas).
Some people go the day before Christmas, a month before Christmas, or whenever they get the time to do it.
In short, there is no simple or right answer for your question :)
But if you feel the need to have your tree up in September, to start with the excitement, then go for it!
most Europeans put up their Christmas trees between December first to December twenty fourth
A star or angel
yes
It really isn't too early too put up the Xmas tree for it all depends on if you have the Christmas spirit. In 2 weeks is the first day of advent which is when some people put their Christmas tree up so it is perfectly ok to do so.
To put the present under it
You don't. Christmas trees have nothing to do with Hanukkah. If you put Hanukkah-style ornaments on a Christmas tree, it will most likely offend the people you are trying to honor (even if they don't tell you that).
The two most popular Christmas tree toppers are a star and an angel. The angel tree topper, however, is only favored by about 9% of people who put up a tree.
Thanksgiving
Candles.
Because they want to.
because it is a traditon
Some people have a star or an angel on top of their Christmas tree.
In Australia, many people put up their Christmas tree on the 1st day of December. It varies. There is no tradition in Australia for when to put up the Christmas tree. Some people put it up early in December, while others put it up at various times in the weeks preceding Christmas. Some may leave it until Christmas Eve. There is truly no tradition.