December, in the Roman calendar was Ærra Geola or the month “before Yule,” before the feast.

4th New moon in Sagittarius and Solar eclipse

19th Full moon
Celtic- Cold moon.
Medieval- Oak moon.
Native American- Long Nights Moon 
Long night moon.
Cherokee- Snow moon

21st Winter Solstice – Sun in Capricorn

25th Christmas day

26th Boxing Day