Just like jesus, god, Santa and the Easter Bunny, magic isn’t real. It is scientifically plausible to go forward in time, but not backwards (at least, not without figuring out how to harness Tachyons; little sub-atomic particles that appear to flow backwards, against time). But to go forward in time, you need to be traveling at the speed of light or faster.
Let’s say you’re orbiting around the earth at the speed of light for what to you is 5 years. When you come back to earth, 5 years passed for you, but for everyone else, it’s been much longer. This is because physical time (aging) is actually fictional, it is nothing but our perception of what the earth’s gravitational force gradually does to our bodies over the years of gravitational pressure pushing/pulling our bodies downward.