December’s Full Moon is on Sunday, December 3rd at 10:47 PM EST; this Full Moon ends the cycle that started on May 25th 2017 with the New Moon in Gemini. The Moon moves into Gemini at 4:21 PM on Saturday December 2nd, and exits Gemini at 2:13 PM on Monday December 4th. This information is also available in list form in my December 2017 Cosmic Concerns post.
Importantly, Mercury, which is Gemini’s ruling planet, goes Retrograde just before the Full Moon at 2:34 AM EST on Sunday the 3rd. Because of that, I recommend doing your Full Moon ritual on the evening of December 2nd after 4:21 PM. You can do your ritual any time on December 3rd if you choose, of course. Regardless, to charge items, they should sit out on the night of the 2nd. December’s Full Moon is also a Supermoon, so enjoy the extra close Moon time.
My guide, Witch’s Guide to Full Moon Magick, can be found on the site here; this post is a companion to that guide. If you’re new to Moon magick that’s a great place to begin.
About December’s Full Moon
There are many names for December’s Full Moon, but the most common is the Cold Moon and Long Nights Moon. Native Americans called it the Cold Moon for obvious reasons; the December Full Moon shines down on some chilly weather. Additionally, some Native American tribes called it the Long Nights Moon because it’s the time of the year when the night is the longest. For modern people, winter can be anywhere between somewhat inconvenient and quite enjoyable, but traditionally winter was a time of extreme danger through which survival was not guaranteed. The message of December’s Full Moon, grounded in this tradition, is that the winter has arrived and it must be endured.