How Did Today'S Calendar Become Global Nearly 2025 Years Ago. Humans have been keeping time since at least the neolithic era. For example, in 238 bce the egyptian ruler ptolemy iii.
In this blog post, we examine the incredible. The widespread adoption, around 2000 years ago, of the julian calendar placed most of humanity on the same footing, with leap years every four years helping to keep the.
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