We have learned to approximate and then precisely measure time millennia ago through various means, yet never on this journey we learned to alter it, except by a miniscule margin using relativistic effects.
We can measure distance, and we can move things. We can measure illumination, and we can create light. We can measure sound, and produce it. Alter temperature? Yes! Produce all sorts of artificial radiation? Yes! Electric charge? Sure!
But time? Nuh-uh.
You can skip percieved time by sleeping.
You can also alter time by going fast. Satellites have to account for time dilation for their positioning.
Sure, that’s what I mentioned under relativistic effects
But it’s very minor and mostly hypothetical for anything but clock correction
Fun fact about relative speeds though if you can drive at 1/5 of the speed of light you should never get a ticket for running a red light as all red light will be green due to the doppler effect. That said the speeding ticket you’ll get…
Well the light would only be green to you not to the traffic cameras or police right?
The ticket will be so hard next one will be for the bus
Love those hypotheticals, though