Actually, there is no such thing as time as a dimension. It is not controlled by gravity, there is no such thing as measuring time it is etherial, a phenomanon.
Basically we think of time because we get older and die but its not time that does that, it is gravity and decay.
You can look at the past by looking at a star that died say 2 million years ago. We see the light in the event but we are looking at an event that happened a long event ago so it is the past, therefore, light, travelling through the structure of the universe to us is continual but it actually isnt. In reality, it is an event that we see now in the present that happened a long time ago, the past, then we see that light because it is viewed optically by our human eyes but that star disapeared in a past event and we are viewing it in a past event, it doesn’t exist. But it did. We only measure time by light and sound. These are phenominom not controlled by time at all but by space and optical audio creations which we see and hear because we are built that way.