If you live on the moon, every time you see sun rises your friends on earth saw sun rises 30 times already.

If you put atomic clocks on every planets they will run at different rate.

What is time? Time is what?

Sun rises is not time, clock ticking is not time, number is not time. 

We measure time by observing and counting matters movement, all movements are caused by energy/force and carried by matter. 

Is time a function of matter and energy?

All matters in the infinite space are connected by gravity, all energy/forces are moving at light/gravity/electrostatic force speed, all matters are moving/vibrating under force. The whole thing is alive and immortal. 

Time is life, get a life.