Selene Calendar

A single global UTC-synced lunisolar calendar. Each Moon Month is named by the meridian degree at its New Moon, divided into 4 weeks (8 half-weeks of 7 unequal half-days each). Half Years anchor on the New Moon nearest each solstice; Leap Eras (~2.5 yr / 31 moon months) and Metonic Eras (19 yr) align lunar and solar rhythms over deeper time.