I think it's even more complicated than that. Human time is much richer even than wall-clock time. E.g., if I go out for a dawn run every day, to me that's the

I think it's even more complicated than that. Human time is much richer even than wall-clock time. E.g., if I go out for a dawn run every day, to me that's the same time. Or think of the Jewish Sabbath, which runs from sundown Friday to after dark on Saturday. Lunchtime. Teatime. Lunar calendars. Whatever people will do when they live on Mars. Or the way wall-clock time existed before railroads changed it. It's often our job to cram human concepts into a small number of bits, so I get why we do what we do. But I think it's sometimes worth being explicit that the anthropological concepts we are dealing with are very complex, and we may leave a lot out when we simplify them enough to make sense to the sort of machine that can be cheaply built in its era.