To cut a long story short, my 15yo BIL (who lives with us) hates christmas. In previous years we have kept it relatively low key - presents not wrapped, tiny tree, no christmas dinner, nothing in December etc.
However, this year my eldest is 4. He is at school so is more and more away of what christmas should be like and is really excited about it this year and so I want to do a 'proper' christmas day, with dinner, wrapped presents, a big tree, lots of decorations, christmas songs etc. DP doesn't and thinks IABU as he thinks it will upset BIL. I think BIL is old enough to be told that while we know he won't enjoy it, its for one day, and for the boys, and he doesn't have to join in.
We have been doing stuff so far in December that we would not normally do anyway (advent calendars, christmas markets etc) and while BIL hasn't joined in, he hasn't been too upset about the whole thing either, so I think he will be OK on the day.
So IABU for wanting christmas for my boys?