Moon Sign Runs
A compact view of how the Moon moves through the zodiac across the month.
Lunation Calendar
Moon Phases September 2031
Exact UTC dates, times, zodiac signs, and Moon sign ingress data for every major lunar phase in September 2031, plus a full month-view calendar and local-time conversions for your browser.
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Local timing for the September 2031 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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September 2031 lunar calendar
Use this panel to personalize the September 2031 calendar.
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Featured local timings
Full Moon in Pisces
Sep 1, 2031, 9:21 AM UTC
Canonical dates stay in UTC, but this panel converts them to your browser timezone.
Last Quarter in Gemini
Sep 8, 2031, 4:14 PM UTC
Canonical dates stay in UTC, but this panel converts them to your browser timezone.
New Moon in Virgo
Sep 16, 2031, 6:47 PM UTC
Canonical dates stay in UTC, but this panel converts them to your browser timezone.
First Quarter in Capricorn
Sep 24, 2031, 1:20 AM UTC
Canonical dates stay in UTC, but this panel converts them to your browser timezone.
Lunar Phase Events
Full Moon
in PiscesDateSeptember 1, 2031
Time (UTC)09:21 AM UTC
Local: Sep 1, 2031, 9:21 AM UTC
SignPisces
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 PiscesLast Quarter
in GeminiDateSeptember 8, 2031
Time (UTC)04:14 PM UTC
Local: Sep 8, 2031, 4:14 PM UTC
SignGemini
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 GeminiNew Moon
in VirgoDateSeptember 16, 2031
Time (UTC)06:47 PM UTC
Local: Sep 16, 2031, 6:47 PM UTC
SignVirgo
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 VirgoFirst Quarter
in CapricornDateSeptember 24, 2031
Time (UTC)01:20 AM UTC
Local: Sep 24, 2031, 1:20 AM UTC
SignCapricorn
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 CapricornFull Moon
in AriesDateSeptember 30, 2031
Time (UTC)06:58 PM UTC
Local: Sep 30, 2031, 6:58 PM UTC
SignAries
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 AriesMonth View Calendar - September 2031
Each day shows the Moon sign at noon UTC, any major phase event, and exact UTC Moon sign ingresses. Use the personalization panel above for local-time conversion and location-specific context.
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Exact Moon Sign Ingresses
These are the exact UTC sign changes for the Moon in September 2031, with local-time conversion shown below each ingress.
September 2, 2031 at 08:28 PM UTC UTC
Local time: Sep 2, 2031, 8:28 PM UTC
The Moon leaves Pisces and enters Aries.
September 5, 2031 at 12:47 AM UTC UTC
Local time: Sep 5, 2031, 12:47 AM UTC
The Moon leaves Aries and enters Taurus.
September 7, 2031 at 09:05 AM UTC UTC
Local time: Sep 7, 2031, 9:05 AM UTC
The Moon leaves Taurus and enters Gemini.
September 9, 2031 at 08:42 PM UTC UTC
Local time: Sep 9, 2031, 8:42 PM UTC
The Moon leaves Gemini and enters Cancer.
September 12, 2031 at 09:27 AM UTC UTC
Local time: Sep 12, 2031, 9:27 AM UTC
The Moon leaves Cancer and enters Leo.
September 14, 2031 at 09:06 PM UTC UTC
Local time: Sep 14, 2031, 9:06 PM UTC
The Moon leaves Leo and enters Virgo.
September 17, 2031 at 06:40 AM UTC UTC
Local time: Sep 17, 2031, 6:40 AM UTC
The Moon leaves Virgo and enters Libra.
September 19, 2031 at 02:10 PM UTC UTC
Local time: Sep 19, 2031, 2:10 PM UTC
The Moon leaves Libra and enters Scorpio.
September 21, 2031 at 07:53 PM UTC UTC
Local time: Sep 21, 2031, 7:53 PM UTC
The Moon leaves Scorpio and enters Sagittarius.
September 23, 2031 at 11:56 PM UTC UTC
Local time: Sep 23, 2031, 11:56 PM UTC
The Moon leaves Sagittarius and enters Capricorn.
September 26, 2031 at 02:27 AM UTC UTC
Local time: Sep 26, 2031, 2:27 AM UTC
The Moon leaves Capricorn and enters Aquarius.
September 28, 2031 at 04:09 AM UTC UTC
Local time: Sep 28, 2031, 4:09 AM UTC
The Moon leaves Aquarius and enters Pisces.
September 30, 2031 at 06:18 AM UTC UTC
Local time: Sep 30, 2031, 6:18 AM UTC
The Moon leaves Pisces and enters Aries.
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 September 2031 moon calendar
Open the cited books and chapters behind the monthly lunation calendar.
Moon Phases September 2031 - FAQ
When is the full moon in September 2031?
The full moon in September 2031 is on September 1, 2031 at 09:21 AM UTC UTC, in Pisces. The page also converts that moment into the visitor's local timezone.
When is the new moon in September 2031?
The new moon in September 2031 is on September 16, 2031 at 06:47 PM UTC UTC, in Virgo. The page also converts that moment into the visitor's local timezone.
How many moon phases are there in September 2031?
There are 5 major lunar phase events in September 2031: Full Moon, Last Quarter, New Moon, First Quarter, Full Moon.