It's not irrelevant to them (and anybody else who uses or wakes to daylight) coordinating with the rest of society, though. Which is the function of a standardi

It's not irrelevant to them (and anybody else who uses or wakes to daylight) coordinating with the rest of society, though. Which is the function of a standardized time. It didn't exist up until railroads were popular; before that each town set its own time based on solar noon.