lunar calendars
Moon cycle schedules
Lunar calendars are timekeeping systems based on the cycles of the moon rather than the sun.
Each month corresponds roughly to one lunar cycle—about 29.5 days from new moon to new moon.
Pure lunar calendars like the Islamic calendar drift through the seasons over time, while lunisolar calendars like the Hebrew and Chinese calendars add periodic adjustments to stay aligned with the solar year.
Ramadan shifts earlier each year because it follows a lunar calendar.
- crescentCurved sickle-like arc
- moon phasesShifting illumination of satellite
- monthsYear's twelve parts
- metonic cycle19-year lunisolar synchronization period
- cycleRepeating sequence of events
intercalation · eclipse · phases · night sky · astronomical tables · moon · harvest festivals · full moon · Passover · equinoxes · waxing · almanac · Hebrew · Islamic · sacred time · Chinese · full moon festival · harvest
- calendarsalmanac, almanacs, planners, diaries, datebooks
- almanacscalendars, Farmers Almanac, Old Farmer's Almanac, ephemeris, chronicle
- indigenous lifewaysthree sisters, tribal customs, pemmican, wild rice, fishing practices
- Inca AstronomyPleiades, Southern Cross, sun worship, moon phases, solstice
- astronomystars, moon, sun, planet, planets
- timekeepingclock, watch, watches, clocks, timer
calendar, lunar, lunisolar calendar, lunatic, lunatics, luna, lunate, lunation, semilunar