lunar months

Synodic time periods

A lunar month is the time it takes for the moon to complete one cycle of phases—about 29.5 days from new moon to new moon.

This is shorter than calendar months, which is why lunar calendars (used in Islamic, Jewish, and Chinese traditions) don't align with the solar year.

The Islamic calendar consists of twelve lunar months.

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calendar · lunisolar · Chinese New Year · intercalation · synodic · phase · sidereal · metonic cycle · tropical · night · Ashura · timekeeping · full · waning · harvest moon · zodiac · gibbous · menstrual

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celestial basis of time measurement

lunar monthscalendar months

Named periods spanning a year

solar year · solar days

calendrical system type

lunar monthssolar calendar

Year measured by sun

Gregorian calendar · Julian calendar · lunisolar calendar

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month, lunar, lunacy, lunatic, luna, lunette, lunate, lunation, semilunar

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