<p>My daughters third grade teacher discussed winter holidays with the class so that they could have a winter party. Otherwise a winter party wouldn’t have been part of the curriculum! Other teachers in the school didn’t have parties for any reason, no Valentines, no Halloween no winter celebrations 
This teacher presented holidays in a pretty straightforward way I thought, although he was heavier on the “Christian” religous celebrations around the world than secular or other religious holidays. Still we didn’t call it a “christmas” party, or exchange presents although there was lots of food!
I think it is a fine line though, I have know teachers who don’t present things in a nonbiased manner but are very biased one way or the other no matter what the actual material consists of. So you basically have to present a paper showing that you ( agree with) understand the material.</p>