You’d notice longer shadows, likely, and they did notice that at different times of the year the sun just wouldn’t cast shadows in certain places. But if I gave you a watch and slowed it down, especially in tiny increments, it would certainly be difficult to notice at first.
I’m responding to a comment about a sundial, not about the length of shadows, which to measure you don’t need a sundial.
Yes if you had a sundial and put even marks around it you would definitely notice
Also people generally track the sun, our circadian rhythms are tied up to it. You notice even now when the days are shorter or longer without a clock
You’d notice longer shadows, likely, and they did notice that at different times of the year the sun just wouldn’t cast shadows in certain places. But if I gave you a watch and slowed it down, especially in tiny increments, it would certainly be difficult to notice at first.
I’m responding to a comment about a sundial, not about the length of shadows, which to measure you don’t need a sundial.