I'm looking for ideas/must does for Christmas!
I'm an exchange student living in the Helsinki area, unfortunately staying for only 1 year. Since we don't really celebrate Christmas in Japan (and because it costs too much to fly back), I'm looking into spending Christmas/New Years here. I'm not too bright on the 'proper' Christmas at all, which is why I'm asking here, to hopefully get some help from people before I do anything wrong and/or offensive

I've noticed many 'Christmas parties' held around early December and Christmas markets (possibly for tourists?) going on in various places, but not on the 25th.
I'm not sure what the Finnish/Western normality is, but in Japan where I believe we value New Years like the Western Christmas, New Years is usually spent at home with family, or at a shrine/temple. The former option, I do have a several Finnish friends - but it would be down right rude to ask to join a family's New Years in Japan, so I'm assuming the same in European Christmas. The latter option, I have no problems with going to any religious facility (with respect, of course), but I'm not sure if Church events are open to non-Christians, nor if they even do anything on Christmas that is OK for anyone to join.
I'm well interested in Classical music, kansanmusiikki/tanhu, ballets, operas, art galleries, theatre and such, but not so much in pubs/clubs/discos etc, although I am willing to try anything

And I am up to traveling within Finland as well

It would be wonderful to hear ideas and experiences!
Thank you in advance!