Time is not linear - Simply put, this is the only relative in Einstein's' Special Theory of Relativity. As Gravity or speed, increases, times slows and time and gravity become measurable at different rates at different locations. Thanks to Hollywood, everyone knows and understands that if you and I traveled to a distant star at the speed-of-light, we would only age a few years, but everyone back on earth would have aged hundreds of years. The only way around it is to bend space with a wormhole, but that too violates a few Natural Laws itself. In any case, if time is measurable at different rates anywhere, at any time, then it just suddenly becomes another variable in the equation of life, and every "Carved-in-stone" definition of reality suddenly becomes fluid and confusing.
Time depends on where you are and how fast you may be moving if you are standing at the base of mount Everest you will experience time differently to someone stood on the summit time and space are part of a continuum and inseparable
And then there is the subjective element . Some times time drags other times it will fly by.