Origin of lunar month
First recorded in 1585–95
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- The average time between successive occurrences of the same phase of the Moon, equal to approximately 29 days, 12 hours, 44 minutes. Depending on the lunar calendar being used, a lunar month can begin with the new moon or the full moon. Also called lunation synodic month♦ A period of 12 lunar months is a lunar year.
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