Lunar Calendar Month December 2027 (Guam)

The Moon is the only natural satellite of the Earth and the fifth largest moon in the Solar System. It is the largest natural satellite in the solar system relative to the size of its planet. The following is information specific for Hagåtña, Guam during December 2027.

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Date and time of moon phases

The information in the following table comes from calculations published by the Astronomical Applications Department of the U.S. Naval Observatory.

Moon phases	Dates	Time
1st quarter	2027-12-06	15:22
full moon	2027-12-14	02:09
3rd quarter	2027-12-20	19:11
new moon	2027-12-28	06:12

Apogee and perigee of the Moon

The following table shows the dates of perigee and apogee of the Moon during December 2027.

Position	Dates	Time	Distance	Notes
Apogee	2027-12-04	18:43	404,661 km
Perigee	2027-12-16	12:22	364,025 km

Moon-Planet Conjunctions

A Moon-planet conjunction occurs when an astronomical object has either the same, or nearly the same, right ascension or the same ecliptic longitude of that of the Moon, as observed from Earth.

Astronomical Objects	Date and Time
Pleiades	2027-12-12 13:55
Beehive	2027-12-17 06:23
Antares	2027-12-26 04:01
Venus	2027-12-31 11:54

Illumination of the Moon

The following table depicts the illumination of the Moon, calculated at 00:00, throughtout the 31 days of December 2027.

December 2027
w	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
Week 48	29 Monday	30 Tuesday	1Wednesday 6% illuminated Age: 2.3	2Thursday 11.5% illuminated Age: 3.3	3Friday 18.3% illuminated Age: 4.2	4Saturday 26.2% illuminated Age: 5.1	5Sunday 34.9% illuminated Age: 5.9
Week 49	6Monday 44.1% illuminated Age: 6.8	7Tuesday 53.6% illuminated Age: 7.7	8Wednesday 63.1% illuminated Age: 8.6	9Thursday 72.2% illuminated Age: 9.6	10Friday 80.8% illuminated Age: 10.5	11Saturday 88.3% illuminated Age: 11.5	12Sunday 94.3% illuminated Age: 12.5
Week 50	13Monday 98.4% illuminated Age: 13.6	14Tuesday 100% illuminated Age: 14.6	15Wednesday 98.9% illuminated Age: 15.7	16Thursday 95.1% illuminated Age: 16.9	17Friday 88.7% illuminated Age: 18	18Saturday 80.1% illuminated Age: 19.1	19Sunday 70.1% illuminated Age: 20.2
Week 51	20Monday 59.1% illuminated Age: 21.3	21Tuesday 47.8% illuminated Age: 22.4	22Wednesday 36.9% illuminated Age: 23.4	23Thursday 26.7% illuminated Age: 24.4	24Friday 17.9% illuminated Age: 25.4	25Saturday 10.6% illuminated Age: 26.4	26Sunday 5.1% illuminated Age: 27.4
Week 52	27Monday 1.6% illuminated Age: 28.3	28Tuesday 0.1% illuminated Age: 29.3	29Wednesday 0.5% illuminated Age: 0.7	30Thursday 2.8% illuminated Age: 1.6	31Friday 6.9% illuminated Age: 2.5	1 Saturday	2 Sunday
	3 Monday	4 Tuesday	5 Wednesday	6 Thursday	7 Friday	8 Saturday	9 Sunday
	10 Monday	11 Tuesday	12 Wednesday	13 Thursday	14 Friday	15 Saturday	16 Sunday