<P> 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 . 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 with respect to the Earth - Sun line , are still the basis of many calendars today , and are used to divide the year . </P>
<P> 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 . 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 with respect to the Earth - Sun line , are still the basis of many calendars today , and are used to divide the year . </P>
where does the concept of the month come from
where does the concept of the month come from
as early as the Paleolithic age
as early as the Paleolithic age