December's moon officially reached full illumination at 4:02 a.m. EST (0902 GMT) on Dec. 15, but it will still appear relatively full for a few days around the peak. Known as the ColdMoon ...
December: Cold moon – Dec. 4, 6:14 p.m.; as winter approaches, this moon reflects the bitter cold and long nights of December. This is the last supermoon of the year.
and the ColdMoon occurs in frosty December. At least, that's how it works in the Northern Hemisphere. In the Southern Hemisphere, where the seasons are switched, the Harvest Moon occurs in ...