MONTH

Month

A month is a unit of time, used with calendars, which was first used and invented in Mesopotamia, 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 are synodic months and last approximately 29.53 days. From excavated tally sticks, researchers have deduced that people counted days in relation to the Moon's phases as early as the Paleolithic age. Synodic months, based on the Moon's orbital period, are still the basis of many calendars today, and are used to divide the year.

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month

Noun

 The plural is occasionally seen as month (unchanged)
  1. A period into which a year is divided, historically based on the phases of the moon. In the Gregorian calendar there are twelve months: January, February, March, April, May, June, July, August, September, October, November and December.
  2. A period of 30 days, 31 days, or some alternation thereof.
  3. A woman's period; menstrual discharge.


The above text is a snippet from Wiktionary: month
and as such is available under the Creative Commons Attribution/Share-Alike License.

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