Moon phases in December 2031
All 31 days, computed from the ephemeris rather than copied from another calendar: the Moon’s sign, the exact instant it changes sign, and the lit fraction of the disc. Shown in your own timezone.
- New MoonDecember 1422.2° Sagittarius
- Cold MoonDecember 286.8° Cancer
Day by day
The four quarter instants are marked on the day they fall; every other day carries the interval it is in. Four of the eight phases are moments and four are stretches, which is the one thing most calendars leave out.
| Date | Phase | Sign | Illumination | Notes | |
|---|---|---|---|---|---|
| Mon 1 | Waning Gibbous | Cancer | 94% | ||
| Tue 2 | Waning Gibbous | Cancer | 89% | ||
| Wed 3 | Waning Gibbous | Cancer→Leo | 82% | ||
| Thu 4 | Waning Gibbous | Leo | 74% | ||
| Fri 5 | Waning Gibbous | Leo→Virgo | 65% | ||
| Sat 6 | Waning Gibbous | Virgo | 56% | ||
| Sun 7 | Last Quarter | Virgo | 46% | ||
| Mon 8 | Waning Crescent | Virgo→Libra | 37% | ||
| Tue 9 | Waning Crescent | Libra | 27% | ||
| Wed 10 | Waning Crescent | Libra→Scorpio | 18% | ||
| Thu 11 | Waning Crescent | Scorpio | 11% | ||
| Fri 12 | Waning Crescent | Scorpio→Sagittarius | 5% | ||
| Sat 13 | Waning Crescent | Sagittarius | 1% | ||
| Sun 14 | New Moon | Sagittarius→Capricorn | 0% | ||
| Mon 15 | Waxing Crescent | Capricorn | 2% | ||
| Tue 16 | Waxing Crescent | Capricorn→Aquarius | 7% | ||
| Wed 17 | Waxing Crescent | Aquarius | 14% | ||
| Thu 18 | Waxing Crescent | Aquarius→Pisces | 23% | ||
| Fri 19 | Waxing Crescent | Pisces | 33% | ||
| Sat 20 | Waxing Crescent | Pisces | 44% | ||
| Sun 21 | First Quarter | Pisces→Aries | 55% | ||
| Mon 22 | Waxing Gibbous | Aries | 66% | ||
| Tue 23 | Waxing Gibbous | Aries→Taurus | 75% | ||
| Wed 24 | Waxing Gibbous | Taurus | 84% | ||
| Thu 25 | Waxing Gibbous | Taurus→Gemini | 90% | ||
| Fri 26 | Waxing Gibbous | Gemini | 95% | ||
| Sat 27 | Waxing Gibbous | Gemini | 99% | ||
| Sun 28 | Full Moon | Gemini→Cancer | 100% | ||
| Mon 29 | Waning Gibbous | Cancer | 99% | ||
| Tue 30 | Waning Gibbous | Cancer→Leo | 97% | ||
| Wed 31 | Waning Gibbous | Leo | 93% | ||
Rows are UTC calendar days. The exact times follow the timezone setting above, so a time close to midnight can belong to the neighbouring day in your own zone.
- 1
- Full moons
- 1
- New moons
- 13
- Sign changes
- 100%
- Brightest night
The Moon passes through 14 signs this month, in order: Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius, Pisces, Aries, Taurus, Gemini, Cancer, Leo. It changes sign 13 times — roughly every two and a third days, though not evenly, because the Moon’s speed varies about twelve per cent over an orbit.
Frequently asked questions
When is the full moon in December 2031?
There are 1 in December 2031. The exact instants are in the table above, shown in your own timezone, with the degree and sign each one falls on.
When is the new moon in December 2031?
There are 1 in December 2031, listed to the minute in the table above along with every other phase of the month.
What timezone are these times in?
Your own, resolved in your browser. The rows are UTC calendar days, so an instant close to midnight can belong to the neighbouring day once converted — the table marks those with a small +1 or −1. You can switch the whole page to UTC if you want to compare it against a site that publishes UTC.
What sign is the Moon in during December 2031?
It moves through 14 of them, changing sign 13 times. The exact instant of each change is in the sign column above. The Moon spends about two and a third days in a sign, which is why it covers the whole zodiac in a month while the Sun takes a year.