Question

how time is relative

Answer 1

consider you are travelling in a train and two lightning bolt strike traveling towards one lightning bolt and away from one lightning bolt

you will experience that event differently as to a person who is in stationary position thus time is not stubborn but relative

Answer 2

Why Time Is Relative,
... In Einstein's theory of relativity, time dilation describes a difference of elapsed time between two events, as measured by observers that are either moving relative to each other, or differently, depending on their proximity to a gravitational mass.