the moon in waning gibbous phase on a background
phases of the moon — full, crescent, waxing, and waning gibbous
十二,十三:盈凸月/gibbous moon,waxing gibbous 十五,六:满月
quarter),盈凸月(waxing gibbous),满月(full),亏凸月(waning gibbous
the moon is the brightest and roundest on this day which means