We always have turkey dinner around christmas because of the days off. All of my family get together. Which is a pretty big bunch. But it never bothered anyone. In fact I think that's quite common among jw's.
About the conventions during christmas and new years.. OMG in my congregation there was never a free holiday. We always got either an assembly or a co's visit on those days off so you could never plan a trip or anything.....seriously. this happened like 5 years in a row!!!!