I've given some indication of my answer to this question in the post for Day 15, where I explained the religious element which Christmas has for me, through the syncretism between Santa Claus and Saturn. It feels important to have a midwinter festival to cheer up the dark days of winter.
Christmas is also important to me because it is important to so many other people around me. I like it for the same reasons as I like the monarchy, and in fact looking for past LJ posts in which I have explained my reasons for liking the monarchy, I find that I have actually drawn the comparison between it and Christmas before. Whether we like either or not, and however we choose to relate to them, all of us in the UK (and many of us beyond) have those things in common. I don't think that means we need to treat them as sacred cows, but I do think it is valuable and useful - for example by giving us all a central point around which to position ourselves in relation to the institution itself and the other people who also feel some sense of a relationship with it.
Finally, Christmas is important to me because it is something we do every year, in more or less the same way. That makes it comforting and familiar, and helps me to maintain a sense of connection with my own past. The last few Christmases may have been pretty grim, but they haven't all been like that, and I want to remember the ones which were good by continuing to celebrate the festival. Also, the unchanging and cyclical nature of a festival like Christmas helps to set off the gradual changes which take place between one iteration of it and the next. Sadly for me, what it has shown this year is a sharp reflection of how much and how badly things have changed in the life of my family since Mum became ill - but while that has been painful, I think it is something I needed to see.
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