We always learned that time, as we measure it here on earth, is linear. Always the same and never changing. I am to a point in my life where I am starting to understand the space time continuum-time slows a bit as you go towards a thing and speeds up as you go away.
You never get it back, but usually there is more where that came from.
Back to mathematics, Einstein theory of four dimensional, perhaps back to the future had made sense. Not my forte, so will take into account those missing moments are glitches in my hardware....