December 2021 moon phase calendar
Full moon in December 2021
Saturday, December 18, 11:36 p.m.
Moon in Gemini
New moon in December 2021
Saturday, December 4, 2:43 a.m.
Moon in Sagittarius
Total solar eclipse
All times are Eastern Time, which this month is EST (UTC-5). Full moon: Sunday, December 19, 4:36 a.m. UTC. New moon: Saturday, December 4, 7:43 a.m. UTC. On the West Coast the new moon of Saturday, December 4 still falls on the evening of Friday, December 3.
Every moon phase in December 2021: the times of the new moon, quarters and full moon, any eclipses, and the phase, illumination and zodiac sign for each day. All times are Eastern Time.
December 2021 moon calendar
Moon phases and eclipses in December 2021
- Total solar eclipseSaturday, December 4, 2:33 a.m. Sagittarius
- New moonSaturday, December 4, 2:43 a.m. Sagittarius
- First quarterFriday, December 10, 8:36 p.m. Pisces
- Full moonSaturday, December 18, 11:36 p.m. Gemini
- Last quarterSunday, December 26, 9:24 p.m. Libra
An eclipse's time is the moment of greatest eclipse. A total solar eclipse is total only along the narrow path of the Moon's shadow; across a much wider area around it, it appears partial. Not every eclipse is visible from the US.
December 2021 day by day
| Day | Phase | Illumination | Sign at noon |
|---|---|---|---|
| 1Wed | Waning crescentIllumination 10% | 10% | Scorpio |
| 2Thu | Waning crescentIllumination 4% | 4% | Scorpio |
| 3Fri | Waning crescentIllumination 1% | 1% | Sagittarius |
| 4Sat | New moon2:43 a.m.Illumination 0% Total solar eclipse | 0% | Sagittarius |
| 5Sun | Waxing crescentIllumination 3% | 3% | Capricorn |
| 6Mon | Waxing crescentIllumination 9% | 9% | Capricorn |
| 7Tue | Waxing crescentIllumination 16% | 16% | Aquarius |
| 8Wed | Waxing crescentIllumination 26% | 26% | Aquarius |
| 9Thu | Waxing crescentIllumination 36% | 36% | Pisces |
| 10Fri | First quarter8:36 p.m.Illumination 46% | 46% | Pisces |
| 11Sat | Waxing gibbousIllumination 57% | 57% | Pisces |
| 12Sun | Waxing gibbousIllumination 66% | 66% | Aries |
| 13Mon | Waxing gibbousIllumination 75% | 75% | Aries |
| 14Tue | Waxing gibbousIllumination 83% | 83% | Taurus |
| 15Wed | Waxing gibbousIllumination 90% | 90% | Taurus |
| 16Thu | Waxing gibbousIllumination 95% | 95% | Taurus |
| 17Fri | Waxing gibbousIllumination 98% | 98% | Gemini |
| 18Sat | Full moon11:36 p.m.Illumination 100% | 100% | Gemini |
| 19Sun | Waning gibbousIllumination 100% | 100% | Cancer |
| 20Mon | Waning gibbousIllumination 98% | 98% | Cancer |
| 21Tue | Waning gibbousIllumination 94% | 94% | Cancer |
| 22Wed | Waning gibbousIllumination 89% | 89% | Leo |
| 23Thu | Waning gibbousIllumination 82% | 82% | Leo |
| 24Fri | Waning gibbousIllumination 74% | 74% | Virgo |
| 25Sat | Waning gibbousIllumination 65% | 65% | Virgo |
| 26Sun | Last quarter9:24 p.m.Illumination 54% | 54% | Libra |
| 27Mon | Waning crescentIllumination 44% | 44% | Libra |
| 28Tue | Waning crescentIllumination 33% | 33% | Libra |
| 29Wed | Waning crescentIllumination 23% | 23% | Scorpio |
| 30Thu | Waning crescentIllumination 13% | 13% | Scorpio |
| 31Fri | Waning crescentIllumination 6% | 6% | Sagittarius |
The zodiac sign in the table is where the Moon stands at noon. The Moon changes sign every two to two and a half days, so by the exact moment of a new moon, quarter or full moon it may already be in the next sign. For the phases themselves we give the sign at that exact moment.
Frequently asked questions
When is the full moon in December 2021?
The full moon in December 2021 is on Saturday, December 18 at 11:36 p.m. Eastern Time, with the Moon in Gemini.
When is the new moon in December 2021?
The new moon in December 2021 is on Saturday, December 4 at 2:43 a.m. Eastern Time, with the Moon in Sagittarius. You can't see the Moon at new moon; the first thin crescent shows up in the evening sky a day or two later. The total solar eclipse that comes with this new moon peaks on Saturday, December 4 at 2:33 a.m. ET.
When are the quarter moons in December 2021?
Quarter moons in December 2021: first quarter on Friday, December 10 at 8:36 p.m. and last quarter on Sunday, December 26 at 9:24 p.m. (Eastern Time). At first quarter the right half of the Moon is lit, at last quarter the left half.
When is the Moon waxing in December 2021?
In December 2021 the Moon is waxing on these days: December 5–17. They fall between the new moon and the full moon, when the lit part of the Moon grows each night.
When is the Moon waning in December 2021?
In December 2021 the Moon is waning on these days: December 1–3 and December 19–31. They fall between the full moon and the new moon, when the lit part of the Moon shrinks each night.
Is there an eclipse in December 2021?
Yes: total solar eclipse on Saturday, December 4 at 2:33 a.m. (Eastern Time). An eclipse's time is the moment of greatest eclipse. A total solar eclipse is total only along the narrow path of the Moon's shadow; across a much wider area around it, it appears partial. Not every eclipse is visible from the US.
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