Time doesn't exist until we invent it
The transcontinental railroads led to the invention of time zones. For the first time, everyone needed to be in sync, regardless of what village one lived in.
A few generations later, we're in all in sync, to the second, thanks to the computers in our pockets.
Time is borrowed, wasted, spent. We find the time, slow down time, take our time. Its Miller, quitting, clobberin time. We focus on the stitch in time, hard time, closing time, not to mention big, daylight savings, race against, first, last, due, nick of...
Time is so variable, so based on our experience, that the absolute measure of time is almost meaningless. Don't even get me started about relativity and time travel.