Inspired by the many 'My tree is down' threads I've seen already.
Mine goes up on first Sunday in Dec, which made it the 1st Dec this year.
And it comes down on 1st Jan. We go back to work on 2nd Jan and I like it packed away and cleaned through the day before.
My Mum is a bit more traditional and leaves it up for the full 12 days of Christmas starting Christmas day.