New Moon
December 20, 2025
01:44 AM UTC UTC in Sagittarius
New Moon in SagittariusLunation Calendar
Moon Phases December 2025: New Moon, Full Moon & Signs
Moon phases for December 2025 with calculated UTC times and zodiac signs. New Moon: December 20, 2025 at 01:44 AM UTC in Sagittarius. Full Moon: December 4, 2025 at 11:14 PM UTC in Gemini. The month view below also tracks Moon sign ingresses and local-time conversions.
Key Dates
New Moon and Full Moon in December 2025
Full Moon
December 4, 2025
11:14 PM UTC UTC in Gemini
Full Moon in GeminiCalculation Basis
Hermetikon calculates these lunar timings from its astronomy engine and stores the canonical moments in UTC. They are Hermetikon reference timings, not Swiss Ephemeris output; local times are derived from the UTC moment.
Local personalization
Local timing for the December 2025 moon calendar
The calendar stays canonical in UTC for search, citations, and stable reference. Apply your own coordinates here to convert featured moments into local time and add local ascendant and planetary-hour context.
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Current moon
December 2025 lunar calendar
Use this panel to personalize the December 2025 calendar.
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Planetary hour
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Times appear after a location is applied.
Featured local timings
Full Moon in Gemini
Dec 4, 2025, 11:14 PM UTC
Canonical dates stay in UTC, but this panel converts them to your browser timezone.
Last Quarter in Virgo
Dec 11, 2025, 8:52 PM UTC
Canonical dates stay in UTC, but this panel converts them to your browser timezone.
New Moon in Sagittarius
Dec 20, 2025, 1:44 AM UTC
Canonical dates stay in UTC, but this panel converts them to your browser timezone.
First Quarter in Aries
Dec 27, 2025, 7:10 PM UTC
Canonical dates stay in UTC, but this panel converts them to your browser timezone.
Lunar Phase Events
Full Moon
in GeminiDateDecember 4, 2025
Time (UTC)11:14 PM UTC
Local: Dec 4, 2025, 11:14 PM UTC
SignGemini
The Moon stands in opposition to the Sun, achieving maximum illumination. Classical doctrine treats the Full Moon as a peak of lunar expression - the Moon is fully lit, powerful, and separated from the Sun by the widest arc.
Full Moon in GeminiLast Quarter
in VirgoDateDecember 11, 2025
Time (UTC)08:52 PM UTC
Local: Dec 11, 2025, 8:52 PM UTC
SignVirgo
The Moon stands in its third square to the Sun, now waning and decreasing in light. Classical doctrine marks this as a moment of release, clearing, and dissolution as the cycle moves toward its end.
Last Quarter in VirgoNew Moon
in SagittariusDateDecember 20, 2025
Time (UTC)01:44 AM UTC
Local: Dec 20, 2025, 1:44 AM UTC
SignSagittarius
The Moon conjoins the Sun, becoming invisible and combust. Classical doctrine regards this as the weakest lunar condition - the Moon is without light, applying to the Sun, and incapable of reflecting its rays.
New Moon in SagittariusFirst Quarter
in AriesDateDecember 27, 2025
Time (UTC)07:10 PM UTC
Local: Dec 27, 2025, 7:10 PM UTC
SignAries
The Moon stands in square (quartile) to the Sun, having completed one quarter of its synodic cycle. Classical doctrine marks this as a moment of tension, decision, and action - the Moon's will presses against the solar principle.
First Quarter in AriesDaily Moon Lookup - December 2025
Each row uses a noon UTC reference for the daily phase and Moon sign. Major lunations and sign ingresses keep their calculated UTC moments.
| Date | Phase | Moon Sign | Calculated Events |
|---|---|---|---|
| December 1 | First Quarter83% illuminated | Ariesnoon UTC reference | No major lunation or sign ingress. |
| December 2 | Waxing Gibbous91% illuminated | Taurusnoon UTC reference | |
| December 3 | Waxing Gibbous97% illuminated | Taurusnoon UTC reference | No major lunation or sign ingress. |
| December 4 | Waxing Gibbous100% illuminated | Gemininoon UTC reference | |
| December 5 | Full Moon100% illuminated | Gemininoon UTC reference | No major lunation or sign ingress. |
| December 6 | Full Moon96% illuminated | Cancernoon UTC reference | |
| December 7 | Full Moon91% illuminated | Cancernoon UTC reference | No major lunation or sign ingress. |
| December 8 | Waning Gibbous83% illuminated | Leonoon UTC reference | |
| December 9 | Waning Gibbous74% illuminated | Leonoon UTC reference | No major lunation or sign ingress. |
| December 10 | Waning Gibbous64% illuminated | Virgonoon UTC reference | |
| December 11 | Waning Gibbous54% illuminated | Virgonoon UTC reference | |
| December 12 | Last Quarter44% illuminated | Virgonoon UTC reference | |
| December 13 | Last Quarter34% illuminated | Libranoon UTC reference | No major lunation or sign ingress. |
| December 14 | Last Quarter25% illuminated | Libranoon UTC reference | No major lunation or sign ingress. |
| December 15 | Last Quarter18% illuminated | Scorpionoon UTC reference | |
| December 16 | Waning Crescent11% illuminated | Scorpionoon UTC reference | No major lunation or sign ingress. |
| December 17 | Waning Crescent6% illuminated | Scorpionoon UTC reference | |
| December 18 | Waning Crescent2% illuminated | Sagittariusnoon UTC reference | No major lunation or sign ingress. |
| December 19 | Waning Crescent0% illuminated | Sagittariusnoon UTC reference | No major lunation or sign ingress. |
| December 20 | New Moon0% illuminated | Capricornnoon UTC reference | |
| December 21 | New Moon2% illuminated | Capricornnoon UTC reference | No major lunation or sign ingress. |
| December 22 | New Moon5% illuminated | Capricornnoon UTC reference | |
| December 23 | New Moon11% illuminated | Aquariusnoon UTC reference | No major lunation or sign ingress. |
| December 24 | Waxing Crescent18% illuminated | Aquariusnoon UTC reference | No major lunation or sign ingress. |
| December 25 | Waxing Crescent26% illuminated | Piscesnoon UTC reference | |
| December 26 | Waxing Crescent36% illuminated | Piscesnoon UTC reference | No major lunation or sign ingress. |
| December 27 | Waxing Crescent47% illuminated | Ariesnoon UTC reference | |
| December 28 | First Quarter58% illuminated | Ariesnoon UTC reference | No major lunation or sign ingress. |
| December 29 | First Quarter69% illuminated | Taurusnoon UTC reference | |
| December 30 | First Quarter79% illuminated | Taurusnoon UTC reference | No major lunation or sign ingress. |
| December 31 | Waxing Gibbous88% illuminated | Taurusnoon UTC reference |
Month View Calendar - December 2025
Each day shows the Moon sign at noon UTC, any major phase event, and calculated UTC Moon sign ingresses. Use the personalization panel above for local-time conversion and location-specific context.
Sun
Mon
Tue
Wed
Thu
Fri
Sat
4
20
27
Moon Sign Runs
A compact view of how the Moon moves through the zodiac across the month.
Moon Sign Ingresses
These are the calculated UTC sign changes for the Moon in December 2025, with local-time conversion shown below each ingress.
December 2, 2025 at 03:13 AM UTC UTC
Local time: Dec 2, 2025, 3:13 AM UTC
The Moon leaves Aries and enters Taurus.
December 4, 2025 at 02:48 AM UTC UTC
Local time: Dec 4, 2025, 2:48 AM UTC
The Moon leaves Taurus and enters Gemini.
December 6, 2025 at 01:54 AM UTC UTC
Local time: Dec 6, 2025, 1:54 AM UTC
The Moon leaves Gemini and enters Cancer.
December 8, 2025 at 02:48 AM UTC UTC
Local time: Dec 8, 2025, 2:48 AM UTC
The Moon leaves Cancer and enters Leo.
December 10, 2025 at 07:20 AM UTC UTC
Local time: Dec 10, 2025, 7:20 AM UTC
The Moon leaves Leo and enters Virgo.
December 12, 2025 at 04:04 PM UTC UTC
Local time: Dec 12, 2025, 4:04 PM UTC
The Moon leaves Virgo and enters Libra.
December 15, 2025 at 03:51 AM UTC UTC
Local time: Dec 15, 2025, 3:51 AM UTC
The Moon leaves Libra and enters Scorpio.
December 17, 2025 at 04:38 PM UTC UTC
Local time: Dec 17, 2025, 4:38 PM UTC
The Moon leaves Scorpio and enters Sagittarius.
December 20, 2025 at 04:52 AM UTC UTC
Local time: Dec 20, 2025, 4:52 AM UTC
The Moon leaves Sagittarius and enters Capricorn.
December 22, 2025 at 03:51 PM UTC UTC
Local time: Dec 22, 2025, 3:51 PM UTC
The Moon leaves Capricorn and enters Aquarius.
December 25, 2025 at 01:09 AM UTC UTC
Local time: Dec 25, 2025, 1:09 AM UTC
The Moon leaves Aquarius and enters Pisces.
December 27, 2025 at 08:01 AM UTC UTC
Local time: Dec 27, 2025, 8:01 AM UTC
The Moon leaves Pisces and enters Aries.
December 29, 2025 at 11:57 AM UTC UTC
Local time: Dec 29, 2025, 11:57 AM UTC
The Moon leaves Aries and enters Taurus.
December 31, 2025 at 01:13 PM UTC UTC
Local time: Dec 31, 2025, 1:13 PM UTC
The Moon leaves Taurus and enters Gemini.
Classical Sources on Monthly Lunations
These citations explain why classical astrologers tracked monthly new and full moons, quarterly turns, and conjunction-based month judgments.
Tetrabiblos
Claudius Ptolemy
150
"The second part of the consideration relates to each month, and requires a similar observation of the new or full Moon first taking place on the Sun’s progress through each sign: and it must be remembered, that, if a new Moon should have happened at a period nearest to the Sun’s transit over the past tropical or equinoctial point, the new Moon also in each succeeding sign, until the commencement of the next quarter, are to be observed; but, if a full Moon should have so happened, then similar observation is to be made of each subsequent full Moon. The angles, also, must be duly attended to, as well as the planets and stars ruling in both the places [104] ; and especially the nearest phases, applications, and separations of the planets, and their properties. The peculiar qualities of the two places, and the winds, liable to be excited by the planets themselves and by those parts of the signs in which they may be situated, are likewise to be considered; and also that particular wind, which is indicated by the direction of the Moon’s ecliptical latitude. By the aid of these observations, and by weighing and comparing the existing vigour of each of the several properties and qualities, the general constitution of the atmosphere during each month may be predicted"
CHAPTER XIII MODE OF CONSIDERATION FOR PARTICULAR CONSTITUTIONS OF THE ATMOSPHEREOpen in Reader
Tetrabiblos
Claudius Ptolemy
150
"The third part of this consideration appertains to significations applying more minutely, and points out their force or weakness. In this case, the partile configurations of the Sun and Moon, at the intermediate quarters, as well as at the new or full Moon, are to be attentively regarded; since there is a certain variation in the constitution of the atmosphere, which usually commences about three days before, and sometimes, also, about three days after the Moon has equated her course to the Sun"
CHAPTER XIII MODE OF CONSIDERATION FOR PARTICULAR CONSTITUTIONS OF THE ATMOSPHEREOpen in Reader
Clavis Astrologiae Elimata
Henry Coley
1669
"When you shall make the minute of a ☌ your Basis or Radix, you may give judgment of the change of Weather in that moneth; for your judgment shall be framed according to the principal Dominator of the Angle of every Figure, for that Planet overcomes in the Nature of the Aire; assuming together with these things the Quality of the present time, viz. the season of the year"
Page 280Open in Reader
Books behind the December 2025 moon calendar
Open the cited books and chapters behind the monthly lunation calendar.
Moon Phases December 2025 - FAQ
When is the full moon in December 2025?
The full moon in December 2025 is on December 4, 2025 at 11:14 PM UTC UTC, in Gemini. The page also converts that moment into the visitor's local timezone.
When is the new moon in December 2025?
The new moon in December 2025 is on December 20, 2025 at 01:44 AM UTC UTC, in Sagittarius. The page also converts that moment into the visitor's local timezone.
How many moon phases are there in December 2025?
There are 4 major lunar phase events in December 2025: Full Moon, Last Quarter, New Moon, First Quarter.