Why should that fact be interesting? That the Hebrew Calendar seems to date from the beginning of recorded history? That's about the time that alphabets were invented and adopted throughout the known world. Before the invention of the true alphabet one would have to learn tens - in not hundreds - of symbols to write things down. Very few people could actually read and write in pictographs. That was the domain of priests and scribes. Once the use the alphabets became widespread anyone with a fancy could write creations myths and lengthy histories wherein their uncle/grandfather/chosen people were g-d’s front runners.

Actually, recorded history begins much earlier in Ancient Egypt and Sumer. Writing just wasn’t widespread.

-R