An example of time travel that doesn't involve physically going back or forward in time is known as "time dilation." Time dilation refers to the difference in the passage of time between two observers who are moving relative to each other or experiencing different gravitational fields.
A classic example of time dilation is the "twin paradox." Imagine two identical twins, A and B. Twin A remains on Earth, while twin B travels into space at a high velocity near the speed of light and then returns to Earth. Due to the effects of time dilation predicted by Einstein's theory of relativity, twin B would have experienced time at a slower rate compared to twin A. As a result, when twin B returns to Earth, they would have aged less than twin A.
This example demonstrates how time dilation can occur due to differences in relative motion. It shows that time can pass differently for individuals depending on their relative velocities or gravitational environments. However, it's important to note that this type of time dilation still does not enable traveling to different points in the past or future. It is a consequence of the relativistic effects of motion and gravity on the passage of time.