THE ORIGIN OF TIME

In Mechanics there are several types of motion:

1) Uniform rectilinear motion (URM).
2) Uniformly accelerated motion(UAM).
3) The circular motion (CM).
4) The wave motion (WM).

Time originates from an uniform periodic motion (UPM) like Earth's motion. Time is the tool we use to measure the duration of things. If the origin of time or UPM ceases to be uniform it is not time, but an irregular or variable becoming. Relative time is not time, but an irregular becoming with a certain duration. A clock that is subjected to high speed would not be accurate in measuring time. 

It is not that time is relative, but that speed and gravity transform time (regular becoming) into an irregular becoming.

Elvis Sibilia, Florida, USA