the moon is 20 days old and is in the waning gibbous phase of its lunar cycle. It is 77% illuminated. Moon phase Date First Quarter May 4 Full Moon May 12 Third/Last Quarter May 20 New Moon ...

There are eight phases of the Moon beginning with the new Moon, followed by waxing crescent, first quarter, waxing gibbous, full Moon, waning gibbous, third quarter and finally waning crescent.