Full Idea
Uniform circular motion is most of all a measure, because the number of this is most easily known. …This is why time is thought to be the motion of the [celestial] sphere, because the other changes are measured by this one.
Gist of Idea
Circular motion is the most obvious measure of time, and especially the celestial sphere
Source
Aristotle (Physics [c.337 BCE], 223b14)
Book Reference
Aristotle: 'Physics Books III and IV', ed/tr. Hussey,Edward [OUP 1983], p.53
A Reaction
This makes the year the basic unit of time for the human race. Apparently minutes only became of interest when railway timetables appeared in the 1850s.