Full Moon · December 4, 2025
Full Moon of December 4, 2025
The full moon of December 2025 falls on Thursday, December 4, 2025 at 23:14, London time, in Gemini. Tradition calls it the Cold Moon: the last of the year, high and clear in the long nights. The time comes from a real astronomical calculation, to the minute: it is the exact instant the Moon faces the Sun, wherever you are.
The exact data
- Date
- Thursday, December 4, 2025
- Exact time (London)
- 23:14
- UTC time
- 23:14
- Sign
- Gemini
- Traditional name
- Cold Moon
What this lunation colors
December, short days, year-end full of reckonings and grand declarations: the Sun moves through Sagittarius, the sign of convictions and the wide view of meaning. Across from it, the full moon in Gemini defends the other end of the axis: nuance, detail, the question that stays open. The third house facing the ninth, near knowledge facing far-off truth. What ripens under this light is your year’s conversations: the threads opened at June’s new moon show where they led, and the words exchanged reveal what they built or damaged. It’s a talkative full moon, sometimes oversaturated: everyone’s speaking, information crosses, the mind races fast and late. Tradition reads it as a maturing of language itself: was what needed to be said actually said? Was what was said actually true? And what asks to be released here is rarely an object: it’s a certainty grown too narrow, a story you’ve told about yourself so long that you’ve stopped checking whether it still holds. Mutable Gemini doesn’t force you to conclude: it gives you permission to say “I’m not sure anymore,” often the most freeing sentence of the winter. Keep the questions alive; let the tired answers go.
The full portrait of this lunation, to read before the day: full moon in Gemini.
A simple ritual to welcome it
Before sleep, empty your head onto the page: everything talking inside you, with no order or style, three pages if you need them. A saturated Gemini first needs a spillway. The next day, reread and underline a single sentence: the certainty you repeat most often. Write it at the top of a fresh page, followed by “and what if it’s more complicated than that?,” and let ten minutes of answers come. Finish with an hour without words: no screens, no sung music, just walking or working with your hands. After so many words, silence stands in for an inner full moon.