I'll be at Church, actually. I now feel I'm hogging this thread. My Granny and myself will go the evening before, as she's really old and can't do midnight mass. We all go to midnight mass (love the Carols) and then to the morning one (while the meats are slow roasting in the oven). Our church is five minutes walk away. So there!
I still think it�s a festival based on having a bit of fun in the dark, cold midwinter though. Jesus was not born then, he was a spring baby. Lambs aren't normal outside of spring even round the Biblical areas.