who came up with 12 months in a year?

Answer 1

Ultimately, all calendars began with people recording time by using natural cycles: days, lunar cycles (months), and solar cycles (years).

The year is 365 days 5 hours 48 minutes 46 seconds long or 365.242199 days.

The time between full moons is 29.53 days.

The Ancient Egyptians are credited with the first calendar of 12 months, each consisting of 30 days, comprising a year. They later added 5 days at the end of the year to syncronize somewhat with the solar year.

By making all their months an even 30 days, they abandoned trying to sync with lunar cycles and concentrated instead on aligning with the solar year.

The Egyptians recognized that this calendar didn't quite align with a actual year. They called the 1461 Egyptian years it took to re-align with the 1460 solar years a Sothis Period.

Eventually, the Greek rulers of Egypt under Ptolemy added the concept of a leap year, adding a day every 4 years. The Romans reinforced this concept when they later ruled Egypt

Answer 2

The Government

Answer 3

Irving Dozen. For some strange reason he liked the number 12.

Answer 4

Joseph J. Calendar

Answer 5

It began with the Greek Calender based on the lunar year and then the Romans had the Civic calender in 6th century AD.

Answer 6

The Muslims came up with the calendar we use. It is based on their main religious days and celebrations.

Answer 7

the same ones who came up with 299 cost for an item @ the store

Answer 8

Observations, before modern calendars were invented, based on lunar cycles.... a full moon roughly every 'month'

Answer 9

Maya calendar

Answer 10

The moon. There are twelve rotations of the moon in a year.