Why not just use a 24 hour clock, like military time? I understand what am and pm mean, but why did we even start, why haven’t we switched so there’s never confusion?
In:
Solar noon is easy to observe without instruments and it happens at about the same time regardless of season, it’s only off by 6 or so minutes, unlike sunrise/sunset which drift several hours. So it was just a natural split for ancient people to see time as before noon and after noon on their sundials or whatever. Another natural reason for splitting day into halves is night and day, but as I mentioned it’s harder to observe when that split is crossed.
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