Since this is a Romano-Celtic list, I'm curious to hear how you all celebrate (if at all) this time of year. Do you tend to do some sort of winter solstice kind of thing, Saturnalia, or something else? In the past I've celebrated Saturnalia with gift giving, and offerings to the Gods. I tend to make offerings to Gods specifically associated with Saturnalia, but also leave my offerings open enough to be inviting for any other "spirits of the season" (since this is such a beautifully convergent time of year for so many faiths).
I'm curious to hear people's thoughts, and/or brainstorm on possible ways of celebrating this time of year from a Romano-Celtic perspective.