Where was the length of the year determined for the first time in human history?

The first who were able to determine the length of the year were the ancient Egyptians. As far as we know, it was in ancient Egypt that the first calendar appeared, however, there the year had only 9 months. This arrangement of things was due to the fact that the ancient Egyptians adjusted to the harvesting system, and it was necessary to accurately determine the rainy, hot and most favorable periods for agriculture.



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