Albert Einstein's theory of relativity:
Relativity of simultaneity: Two events, simultaneous for one observer, may not be simultaneous for another observer if the observers are in relative motion.
Time dilation: Moving clocks are measured to tick more slowly than an observer's "stationary" clock. = past, present, future is made by the human need to classify existence; it is all connected and spinning on the same movement; it just depends on your perspective.