Recall the agriculture (farming) led to civilization. Why do you think the first civilizations developed calendars that kept track of the days of the year?
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The reason why is that agriculture is a higly seasonal economic activity. The growth of crops depends largely on the season of the year.

Because agriculture was the most important economic activity of ancient civilizations, these civilizations had to keep track of time, in order to know when to grow the crops, when to collect them, and when to regrow them.

in november 1781, john hanson became the first president of the united states in congress assembled, under the articles of confederation. many people have argued that john hanson, and not george washington, was the first president of the united states, but this is not quite true.

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