The full moon in December 2025
December's full moon — traditionally the Cold Moon — with its exact peak computed from JPL ephemeris data and shown in your timezone.
The sky at the instant of the full moon — the Moon in Gemini, the Sun exactly opposite, both at their computed longitudes
December 4, 2025 at 23:14 UTC
Full moon in Gemini · peak illumination — the instant the Moon sits exactly opposite the Sun
A full moon in Gemini
A full moon in Gemini crowds the channel — conversations, messages, and half-formed ideas all arrive at once. Write things down; decide which three actually matter tomorrow.
Also this month
The new moon falls on December 20, 2025 at 01:43 UTC in Sagittarius— the start of the next lunar cycle.
Every time on this page is computed from JPL ephemeris data — the same source NASA navigates by — and shown in your timezone. Want to know what the sky is doing to your chart? Start with the Big Three quiz or build your chart.