Permabanned
IMO that's our inability to measure time. There's only ever one correct answer for how much time has passed. I'd imagine every answer known to man currently is flawed in some way or other.But it's not the same time. Time is relative.
If you tried to keep time fixed on an interplanetary scale you'd rapidly hit problems GPS satellites have to account for the fact they experience time slower than we do on earth.
Earth and mars travel at differnt speeds and rotate at differnt speeds so 1 second on each planet is not the same as 1 second on the other from the others perspective.