Lunar Calendar Month May 2028 (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 May 2028.

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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	2028-05-02	12:26
full moon	2028-05-09	05:49
3rd quarter	2028-05-16	20:43
new moon	2028-05-24	18:16
1st quarter	2028-05-31	17:36

Apogee and perigee of the Moon

The following table shows the dates of perigee and apogee of the Moon during May 2028.

Position	Dates	Time	Distance
Perigee	2028-05-05	20:32	366,531 km
Apogee	2028-05-17	19:56	404,275 km
Perigee	2028-05-31	16:19	369,756 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
Beehive	2028-05-02 05:00
Antares	2028-05-10 18:04
Beehive	2028-05-29 10:30

Illumination of the Moon

The following table depicts the illumination of the Moon, calculated at 00:00, throughtout the 31 days of May 2028.

May 2028
w	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
Week 18	1Monday 33.3% illuminated Age: 5.8	2Tuesday 44.3% illuminated Age: 6.8	3Wednesday 55.6% illuminated Age: 7.9	4Thursday 66.8% illuminated Age: 9	5Friday 77.3% illuminated Age: 10.1	6Saturday 86.3% illuminated Age: 11.2	7Sunday 93.3% illuminated Age: 12.3
Week 19	8Monday 97.9% illuminated Age: 13.4	9Tuesday 99.9% illuminated Age: 14.5	10Wednesday 99.3% illuminated Age: 15.6	11Thursday 96.2% illuminated Age: 16.6	12Friday 91.1% illuminated Age: 17.6	13Saturday 84.3% illuminated Age: 18.6	14Sunday 76.3% illuminated Age: 19.5
Week 20	15Monday 67.5% illuminated Age: 20.5	16Tuesday 58.2% illuminated Age: 21.4	17Wednesday 48.7% illuminated Age: 22.3	18Thursday 39.3% illuminated Age: 23.2	19Friday 30.3% illuminated Age: 24.1	20Saturday 21.9% illuminated Age: 25	21Sunday 14.4% illuminated Age: 25.9
Week 21	22Monday 8.2% illuminated Age: 26.8	23Tuesday 3.5% illuminated Age: 27.8	24Wednesday 0.7% illuminated Age: 28.8	25Thursday 0.1% illuminated Age: 0.2	26Friday 1.8% illuminated Age: 1.3	27Saturday 5.9% illuminated Age: 2.3	28Sunday 12.4% illuminated Age: 3.4
Week 22	29Monday 20.8% illuminated Age: 4.4	30Tuesday 30.8% illuminated Age: 5.5	31Wednesday 41.8% illuminated Age: 6.6	1 Thursday	2 Friday	3 Saturday	4 Sunday
	5 Monday	6 Tuesday	7 Wednesday	8 Thursday	9 Friday	10 Saturday	11 Sunday
	12 Monday	13 Tuesday	14 Wednesday	15 Thursday	16 Friday	17 Saturday	18 Sunday