Moon calendar for December 2025

By Maren Tremblay, Fatesight editor · Last updated September 30, 2026

Every day of December 2025 with the Moon's phase and how much of it is lit at 12:00 UTC. The new Moon, the quarters and the full Moon are marked on the day they happen in UTC.

This month's full Moon is the Cold Moon, on December 4, with the Moon in Gemini. The new Moon falls on December 20, with the Moon in Sagittarius.

New Moon, quarters and full Moon in December 2025

Full MoonThursday, December 4, 2025 at 23:14 UTC
Last quarterThursday, December 11, 2025 at 20:52 UTC
New MoonSaturday, December 20, 2025 at 01:43 UTC
First quarterSaturday, December 27, 2025 at 19:10 UTC

Times are in Coordinated Universal Time (UTC), to the minute, and agree with NASA's published table of Moon phases to within two minutes. Where your browser allows, your own clock is shown under each.

The Moon on each day of December 2025
Sun	Mon	Tue	Wed	Thu	Fri	Sat
	December 1: Waxing gibbous, 83% lit	December 2: Waxing gibbous, 91% lit	December 3: Waxing gibbous, 97% lit	December 4: Full Moon, 100% lit	December 5: Waning gibbous, 100% lit	December 6: Waning gibbous, 97% lit
December 7: Waning gibbous, 91% lit	December 8: Waning gibbous, 83% lit	December 9: Waning gibbous, 74% lit	December 10: Waning gibbous, 64% lit	December 11: Last quarter, 54% lit	December 12: Waning crescent, 44% lit	December 13: Waning crescent, 34% lit
December 14: Waning crescent, 25% lit	December 15: Waning crescent, 18% lit	December 16: Waning crescent, 11% lit	December 17: Waning crescent, 6% lit	December 18: Waning crescent, 2% lit	December 19: Waning crescent, 0% lit	December 20: New Moon, 0% lit
December 21: Waxing crescent, 2% lit	December 22: Waxing crescent, 6% lit	December 23: Waxing crescent, 11% lit	December 24: Waxing crescent, 18% lit	December 25: Waxing crescent, 27% lit	December 26: Waxing crescent, 36% lit	December 27: First quarter, 47% lit
December 28: Waxing gibbous, 58% lit	December 29: Waxing gibbous, 69% lit	December 30: Waxing gibbous, 79% lit	December 31: Waxing gibbous, 88% lit

How is the Moon moving through December 2025?

At noon UTC the Moon is waxing, growing toward full, from December 1 to December 4 and December 20 to December 31 (16 days), and waning on the other 15. It is at least half lit on 15 days. Time between the principal phases: Full Moon December 4, last quarter December 11: 6 days 22 hours; Last quarter December 11, new Moon December 20: 8 days 5 hours; New Moon December 20, first quarter December 27: 7 days 17 hours.

Which sign is the Moon in during December 2025?

Each stay to the minute, in UTC.

Aries: from the start of December 2025 until December 2 at 03:13 UTC.
Taurus: from December 2 at 03:13 UTC until December 4 at 02:49 UTC.
Gemini: from December 4 at 02:49 UTC until December 6 at 01:55 UTC.
Cancer: from December 6 at 01:55 UTC until December 8 at 02:49 UTC.
Leo: from December 8 at 02:49 UTC until December 10 at 07:21 UTC.
Virgo: from December 10 at 07:21 UTC until December 12 at 16:05 UTC.
Libra: from December 12 at 16:05 UTC until December 15 at 03:52 UTC.
Scorpio: from December 15 at 03:52 UTC until December 17 at 16:39 UTC.
Sagittarius: from December 17 at 16:39 UTC until December 20 at 04:53 UTC.
Capricorn: from December 20 at 04:53 UTC until December 22 at 15:52 UTC.
Aquarius: from December 22 at 15:52 UTC until December 25 at 01:09 UTC.
Pisces: from December 25 at 01:09 UTC until December 27 at 08:02 UTC.
Aries: from December 27 at 08:02 UTC until December 29 at 11:58 UTC.
Taurus: from December 29 at 11:58 UTC until December 31 at 13:14 UTC.
Gemini: from December 31 at 13:14 UTC until the end of December 2025.

Questions about the Moon in December 2025

When is the full Moon in December 2025?

The full Moon is on December 4 at 23:14 UTC with the Moon in Gemini. It is the Cold Moon, a name from the Old Farmer's Almanac tradition.

When is the new Moon in December 2025?

The new Moon is on December 20 at 01:43 UTC with the Moon in Sagittarius.

How much of the Moon is lit in December 2025?

At 12:00 UTC on December 1 the Moon is 83% lit (waxing gibbous), on December 15 18% (waning crescent) and on December 31 88% (waxing gibbous). The dimmest day at noon UTC is December 20 at 0%, the brightest December 4 at 100%.

Does December 2025 have a Blue Moon or an eclipse?

No: the one full Moon is December 4, and nothing is eclipsed.