Moon phases in December 2021
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 412.4° Sagittarius
- Cold MoonDecember 1927.5° Gemini
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 | |
|---|---|---|---|---|---|
| Wed 1 | Waning Crescent | Libra→Scorpio | 11% | ||
| Thu 2 | Waning Crescent | Scorpio | 5% | ||
| Fri 3 | Waning Crescent | Scorpio→Sagittarius | 1% | ||
| Sat 4 | New Moon | Sagittarius | 0% | ||
| Sun 5 | Waxing Crescent | Sagittarius→Capricorn | 2% | ||
| Mon 6 | Waxing Crescent | Capricorn | 7% | ||
| Tue 7 | Waxing Crescent | Capricorn→Aquarius | 14% | ||
| Wed 8 | Waxing Crescent | Aquarius | 23% | ||
| Thu 9 | Waxing Crescent | Aquarius→Pisces | 34% | ||
| Fri 10 | Waxing Crescent | Pisces | 44% | ||
| Sat 11 | First Quarter | Pisces→Aries | 54% | ||
| Sun 12 | Waxing Gibbous | Aries | 64% | ||
| Mon 13 | Waxing Gibbous | Aries | 74% | ||
| Tue 14 | Waxing Gibbous | Aries→Taurus | 82% | ||
| Wed 15 | Waxing Gibbous | Taurus | 88% | ||
| Thu 16 | Waxing Gibbous | Taurus→Gemini | 94% | ||
| Fri 17 | Waxing Gibbous | Gemini | 97% | ||
| Sat 18 | Waxing Gibbous | Gemini | 100% | ||
| Sun 19 | Full Moon | Gemini→Cancer | 100% | ||
| Mon 20 | Waning Gibbous | Cancer | 98% | ||
| Tue 21 | Waning Gibbous | Cancer→Leo | 95% | ||
| Wed 22 | Waning Gibbous | Leo | 90% | ||
| Thu 23 | Waning Gibbous | Leo | 84% | ||
| Fri 24 | Waning Gibbous | Leo→Virgo | 76% | ||
| Sat 25 | Waning Gibbous | Virgo | 67% | ||
| Sun 26 | Waning Gibbous | Virgo→Libra | 56% | ||
| Mon 27 | Last Quarter | Libra | 46% | ||
| Tue 28 | Waning Crescent | Libra→Scorpio | 35% | ||
| Wed 29 | Waning Crescent | Scorpio | 24% | ||
| Thu 30 | Waning Crescent | Scorpio→Sagittarius | 15% | ||
| Fri 31 | Waning Crescent | Sagittarius | 8% | ||
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
- 14
- Sign changes
- 100%
- Brightest night
The Moon passes through 14 signs this month, in order: Scorpio, Sagittarius, Capricorn, Aquarius, Pisces, Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius. It changes sign 14 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 2021?
There are 1 in December 2021. 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 2021?
There are 1 in December 2021, 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 2021?
It moves through 14 of them, changing sign 14 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.