All know that the sun travels once around Oerth every 364 days, visiting the Twelve Lairs of the Zodiac in an appointed round that never varies. The pale Great Moon, called Luna, waxes and wanes in fixed cycles of 28 days each, upon which the months are based. The aquamarine Lesser Moon, Celene, follows a path that reveals her full beauty but four times each year, thus showing the time for civilized festivals.
DOZENMONTH OF LUNA AND THE FOUR FESTIVALS
Yearly representation of the calendar on drop box.