Moon Calendar — December 2021
The Moon's zodiac sign for every day of December 2021, with sign-change times and all four phases — computed from real planetary positions. Times are UTC.
The Moon in December 2021
In December 2021 the Moon changes zodiac sign 14 times and passes through all 12 signs. It starts the month in Scorpio on December 1 and ends it in Sagittarius on December 31. Counting the sign it occupies at noon UTC each day, it spends the most days in Scorpio (5 days), Aquarius (3 days) and Taurus (3 days).
The main lunar phases this month are: New Moon on December 4 in Sagittarius, First Quarter on December 11 in Pisces, Full Moon on December 19 in Gemini and Last Quarter on December 27 in Libra.
For context: the Moon circles the zodiac in about 27.3 days, so it usually stays in one sign for roughly 2 to 2.5 days before moving on. Its phases follow the longer synodic month of about 29.5 days — the time from one new moon to the next — which is why each phase lands on a different date every month. All times here are UTC, so a sign change or phase near midnight may fall on the neighboring date in your time zone.
Phases in December 2021
Moon sign by day
| Date | Moon in | Sign change (UTC) |
|---|---|---|
| Wed, Dec 1 | Scorpio | Libra → Scorpio ~12:00 |
| Thu, Dec 2 | Scorpio | — |
| Fri, Dec 3 | Scorpio | Scorpio → Sagittarius ~13:00 |
| Sat, Dec 4 | Sagittarius | — |
| Sun, Dec 5 | Capricorn | Sagittarius → Capricorn ~12:00 |
| Mon, Dec 6 | Capricorn | — |
| Tue, Dec 7 | Aquarius | Capricorn → Aquarius ~12:00 |
| Wed, Dec 8 | Aquarius | — |
| Thu, Dec 9 | Aquarius | Aquarius → Pisces ~15:00 |
| Fri, Dec 10 | Pisces | — |
| Sat, Dec 11 | Pisces | Pisces → Aries ~22:00 |
| Sun, Dec 12 | Aries | — |
| Mon, Dec 13 | Aries | — |
| Tue, Dec 14 | Taurus | Aries → Taurus ~9:00 |
| Wed, Dec 15 | Taurus | — |
| Thu, Dec 16 | Taurus | Taurus → Gemini ~21:00 |
| Fri, Dec 17 | Gemini | — |
| Sat, Dec 18 | Gemini | — |
| Sun, Dec 19 | Cancer | Gemini → Cancer ~10:00 |
| Mon, Dec 20 | Cancer | — |
| Tue, Dec 21 | Cancer | Cancer → Leo ~22:00 |
| Wed, Dec 22 | Leo | — |
| Thu, Dec 23 | Leo | — |
| Fri, Dec 24 | Virgo | Leo → Virgo ~9:00 |
| Sat, Dec 25 | Virgo | — |
| Sun, Dec 26 | Virgo | Virgo → Libra ~17:00 |
| Mon, Dec 27 | Libra | — |
| Tue, Dec 28 | Libra | Libra → Scorpio ~22:00 |
| Wed, Dec 29 | Scorpio | — |
| Thu, Dec 30 | Scorpio | Scorpio → Sagittarius ~23:00 |
| Fri, Dec 31 | Sagittarius | — |