How did people make plans with each other before clocks? Like how could Roman senators or Medieval European nobles meet together without having a set, standard way of checking the time?

by quintus42

SempaiDono

I did a brief search and found that similar questions have been answered

here (/u/rocketsocks),

here (/u/Xenotechie),

here (/u/sunagainstgold),

and here (/u/TRB1783).