I was always told and have done...... take it down after New Years told it was bad luck before then. I dont know anything about the 5th or 6th.
Ive been itching to take it down, takes up a huge corner of our small living room and 6 kids with all their Christmas presents floating everywhere is not cute.
Same with my wife. "It's baaad luucck!!", she says. But, like you, we have a small living room. While there are only three kids here, I'm running short on sanity also.
Lights and ornaments are off! Time to dismantle. Last I spoke to my lovely bride, she was having a bad day. That may mean that something as silly as a Christmas tree won't matter much in the great scheme of things, or..........it may invoke a Lorena Bobbitt-type rampage. Either way, it will be fine. I guess.
Now.......where's that cup?