Why did the idea of the seasons and their duration develop only among primitive farmers, and not before?

People had an idea of the seasons even before the invention of agriculture. They couldn’t help but see that the seasons changed with a certain frequency. But the idea of the exact duration of the seasons and the whole year began to appear only in the inhabitants of Ancient Egypt. The fact is that the ancient Egyptians were quite enlightened people and had a developed system of government and management of the economy. Effective agricultural management requires an accurate understanding of the time of sowing, maturation, harvesting time, crop quantity, consumption, and how long food supplies will last. Such calculations require an idea of the exact length of the year and each season

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.