Time = ?

What is time ?

The scientific definition says "the second has been defined to be the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom".

Does that change, in any way, what you think time is?

It doesn't matter that much if you can explain things theoretically. It matters more what you do with it.

Especially time.