Lunar Calendar Month January 2027 (Puerto Rico)

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 San Juan, Puerto Rico during January 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
new moon	2027-01-07	16:24
1st quarter	2027-01-15	16:34
full moon	2027-01-22	08:17
3rd quarter	2027-01-29	06:55

Apogee and perigee of the Moon

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

Position	Dates	Time	Distance	Notes
Apogee	2027-01-07	04:12	406,608 km
Perigee	2027-01-21	17:51	357,284 km	Maximum perigee in 2027!

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
Antares	2027-01-04 12:34
Pleiades	2027-01-18 04:46
Beehive	2027-01-22 16:18
Jupiter	2027-01-23 20:24
Regulus	2027-01-24 05:19
Antares	2027-01-31 18:48

Illumination of the Moon

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

January 2027
w	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
Week 53	28 Monday	29 Tuesday	30 Wednesday	31 Thursday	1Friday 36.2% illuminated Age: 23.5	2Saturday 26.9% illuminated Age: 24.4	3Sunday 18.7% illuminated Age: 25.3
Week 1	4Monday 11.8% illuminated Age: 26.2	5Tuesday 6.4% illuminated Age: 27.1	6Wednesday 2.6% illuminated Age: 28	7Thursday 0.4% illuminated Age: 28.9	8Friday 0.1% illuminated Age: 0.3	9Saturday 1.5% illuminated Age: 1.2	10Sunday 4.7% illuminated Age: 2.1
Week 2	11Monday 9.6% illuminated Age: 3	12Tuesday 16% illuminated Age: 3.9	13Wednesday 23.9% illuminated Age: 4.8	14Thursday 32.9% illuminated Age: 5.7	15Friday 42.9% illuminated Age: 6.7	16Saturday 53.5% illuminated Age: 7.7	17Sunday 64.2% illuminated Age: 8.7
Week 3	18Monday 74.6% illuminated Age: 9.8	19Tuesday 84% illuminated Age: 10.9	20Wednesday 91.8% illuminated Age: 12	21Thursday 97.2% illuminated Age: 13.2	22Friday 99.8% illuminated Age: 14.4	23Saturday 99.4% illuminated Age: 15.5	24Sunday 96% illuminated Age: 16.7
Week 4	25Monday 90.1% illuminated Age: 17.8	26Tuesday 82.2% illuminated Age: 18.9	27Wednesday 73.1% illuminated Age: 19.9	28Thursday 63.2% illuminated Age: 20.9	29Friday 53.1% illuminated Age: 21.9	30Saturday 43.1% illuminated Age: 22.8	31Sunday 33.6% illuminated Age: 23.7
	1 Monday	2 Tuesday	3 Wednesday	4 Thursday	5 Friday	6 Saturday	7 Sunday
	8 Monday	9 Tuesday	10 Wednesday	11 Thursday	12 Friday	13 Saturday	14 Sunday