We already ate because the plan was to order pizza at the beginning

In theory? Yes. In practice? I'll end up scrolling and procrastinating for an unknowable and unreasonable amount of time.

And I don't see your point here. Yes, the train will sometimes be late. But it will never leave early, which means that as long as I'm there by a certain well-defined point, I'll make it onboard.

Time is a tool that can be used for exploitation, but definitely doesn't have to be.

I mainly want to know when sundown is so I use the palm trick (one hour per palm width, sun to horizon). I can stick it within 15 minutes even when the sun's behind the trees.

Maybe I have a slight obsession with time? I always wear a watch when I'm out the house and collect old Casios. Had a watch since first grade.

I mean in antiquity, parties were often multi-day affairs because the attendees would have walked for multiple days to get there

yes, but how do I compare my resting heartrate to someone else's without someone borrowing someone else's sandglass? Is 130 beats per glass high or low?

A basis for comparison is very useful.

Just the arbitrary notion of how long it takes for an arbitrary number of grains of sand fall through an arbitrary opening at the bottom of an arbitrary bottle.