A month is an amount of time used with calendars. It is about 1/12th of a year. It is a little longer than a natural period of the moon, ca. 29.5 days. In some cultures, the idea for months came from moon phases. People have counted days based on moon phases for a very long time. Months of some calendars are still strongly based on the moon. These are called "lunar calendars".
|Months of the Year|