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A month is a unit of time, used with calendars, which is approximately as long as a natural period related to the motion of the Moon; month and Moon are cognates.The traditional concept arose with the cycle of moon phases; such months (lunations) are synodic months and last approximately 29.53 days.The most common solution to this problem is the Metonic cycle, which takes advantage of the fact that 235 lunations are approximately 19 tropical years (which add up to not quite 6940 days).However, a Metonic calendar will drift against the seasons by about 1 day every 200 years.An anomalistic month is longer than a sidereal month because the perigee moves in the same direction as the Moon is orbiting the Earth, one revolution in nine years.Therefore, the Moon takes a little longer to return to perigee than to return to the same star.The ides occur on the thirteenth day in eight of the months, but in March, May, July, and October, they occur on the fifteenth.The nones always occur 8 days (one Roman week) before the ides, i.e., on the fifth or the seventh.
The moon first appears in March, they name this month Kahlek.
At the simplest level, most well-known lunar calendars are based on the initial approximation that 2 lunations last 59 days: a 30-day full month followed by a 29-day hollow month — but this is only roughly accurate, and eventually needs correction by using larger cycles, or the equivalent of leap days.
Additionally, the synodic month does not fit easily into the year, which makes accurate, rule-based lunisolar calendars complicated.
This system has been used for hundreds of years and throughout many generations.
This calendar is cyclical and relies on the position and shape of the moon.