When I was still in, they made a big stink about Christmas. It was a day that most people happened to have off. So they would sometimes take advantage of that to gather together, provided a big fat boasting session didn't get in the way. They do the same thing during February and April school recesses, too.
Now, they wouldn't even think of putting up a tree, singing Christmas carols, or exchanging gifts on December 25. I have heard a few that would drive their children around to see the lights--something I was told was objectionable. There have been warnings at Big and Great Boasting Sessions around that time that the witlesses needed to be careful about the Christmas songs that would soon be everywhere. I have also seen a$$emblies go right through Christmas.
As for seeing "near celebrations", I have seen something like that once. I remember one year when, on Christmas week, I was invited to spend the night with one of the prominent hounders. They had company coming from Europe that week, probably taking advantage of the time off from work. The plan was for us to have the book study (at their house, which was normal), and for me to spend the night there. In the morning, we were going to go out in field circus--which got stopped by a few centimeters of snow and the father's getting called into work. We wasted the time visiting the a$$embly hell (empty) and an empty Kingdumb Hell. For sure, nothing that came even close to celebrating Christmas.
Yes, I have seen it happen at other times. The scumbag that dragged me into the cancer had quite a few relatives in the cancer, and frequently they would visit our congregation for a few days at a time. Usually, that happened in the middle of February or April recess. In fact, it was during one of these school vacations that the scumbag's nephew (then 8 years old) was pushed on me--and now that I am out of the cancer, probably the early stage of getting me sexually involved with this nephew. Again, they were just taking advantage of children being out of school--and not that it was Christmas.
As a side point, had I known that this sexual setup was happening then, I might well have gone ahead and put up the damn Christmas tree, put on some Christmas music, and started handing out the presents. Then, I would explain at my judicial hearing that at least that would stop me from being put in a situation of possibly having sex with boys. And it would have made it official--and probably an embarrassment.
As for those who are stripping a Christmas celebration of its elements as opposed to merely taking advantage of the time off, I am surprised they don't have some sort of "loose conduct" code for that, too.