Sorry, did not mean to snap at you.
Time is defined this way.
This is one time direction, which flows from past to present.
This is a must as the universe always moves.
These are subdirectional movements, within a galaxy, then star systems, then planetary systems.
Each movement is separated by what is peculiar to that system.
Time within a period on a planet, or in one spot, always relates to that period of time that is measured in either mass area, or as this time is counterweight timed in stringed supposed null space.
As time goes on, it is measured by itself.
Time invest as a measured event, in a mass area, or what is known as an observed time locale, as time just invest.
There is no logic to this however it is true.
Time within a time mass location changes character with very slight changes on the mass itself.
So time, is a characteristic of a mass area itself.
The mass itself, can be out of the most durable substance ever made, however time will still occur around this mass, as time is a quality of the system.Therefore time can and always be measured.
I hope this answer is simplistic enough for your to understand?So, if it is not.