Is "Christmas" were seen as secular (rather than religious), would it be acceptable to celebrate it?

I understand that many (most?) Muslims prefer not to really celebrate Christmas, due to conflicting religious views. However, in truth Christmas is a composite event, of secular (arguably: predominantly), pagan, and Christian origin. Now, it happens that in Russia and many Eastern churches (Christian), the dates are different - and notably: split. The secular part is effectively new year (including gift-giving, celebration of friends and family etc), and the religious festival is on (IIRC) the 7th January. So: hypothetically, if this were more generally the case: would more Muslims be happy to celebrate "wintertime" (insert whatever preferred name) - meaning: just the secular end-of-year celebration, without any confusion of religious overtones? Would there be any haram in such?