During an eclipse, the world gets darker without getting redder. Its most dramatic on a total eclipse of course, but even at 80% to 90% it was a different feel than "sunset". Anyone who is outside regularly in a 80%+ eclipse on a clear and open day will notice the dramatic shift in color.
The key is that you'd have to be standing around and getting used to the colors outside to notice.
I can't believe that nobody wouldn't at least jot down, "Dear diary, today a huge fucking chunk of the sun was missing for about an hour. I sure am glad I'm literate, and that the godkingpharaohboss decided that a chunk of the sun missing warranted a brief note on precious lambskin/temple wall/holy book margin."
https://imgur.com/gallery/8c7rdEU
Whether or not people >1000 years ago would notice this and record it... I refrain from pretending to know.
My memory was of the sun itself distinctly resolving itself into a perfect circle with a sort of contrasting peripheral shadow that I recall describing as being 'like an aspirin pill'.
I blame some 80s TV show where an astronaut gained superhuman powers of some sort after staring directly at the sun.
I've always been curious to know what, if any, affect this has had on my vision (I don't have a terribly good capacity for resolving contrast during twilight).
Try vitamine A. The effect is very noticeable.
... in this case, the eclipse led to the battle being canceled in favor of a peace treaty, out of fear of divine rage.
Dan Carlin covers it in King of Kings (his history of ancient Persia), which is a great listen.