Yes, Tuomas' birthday is on Christmas Day. Back when he used to post at the old---*very old*---forum, I asked him what the various advantages/disadvantages were to this, but he never answered me.
I'll mention this in the proper topic too, but I won't be able to come to the chat tonight. I've got family visiting from out of town, so by the time I would be able to log on, it will probably be so late that the chat will be over. I'll try to see what I can do, but I'll definitely be there on New Year's Eve!