How Does A Lunar Calendar Work. The lunar calendar is a dating system based on a year consisting of synodic months (synodic period is the time that it takes for the object to reappear at the same point in. The chinese calendar is basically lunar, its year consisting of 12 months of alternately 29 and 30 days, equal to 354 days, or approximately 12 full lunar cycles.
During the first two and last two days of passover, some observant jews do not. The lunar calendar marks how the earth, sun, and moon move in relation to each other.