There are three fundamental and closely involved dimensions of time: -1, +1, 0. It's that simple. It's that complex. And there is no fixed singularity of, no fixed string to, the order of them.
That's like asking what dimension of space would earth be in? 1-d, 2-d, or 3-d?What dimension of time would earth be in +1, -1 or 0?
Using light as time, Centauri is in three positions of time all at once. From Sol, -1 (observed). From Sol, +1 (unobserved). From Sol, 0 (unobserved). Any space and time travel to Centauri system will always be -1 (space-time), via +1 (space-time), to 0. (space-time). Any time travel in the whole of space will be -1, via +1, to 0 . . . solely excepting, I think, "entropy". The time dimension of -1 (past) is always pre-existing. The time dimension of +1 (future) is always pre-existing. The time dimension of 0 is always pre-existing as the result third dimensional universe. The past is the future = 0 (3-d). The future is the past = 0 (3-d).Maybe I should have asked if time is different in the dimensions of time of +1,-1 and 0? Is +1 our time and -1 time running in opposite then 0 black hole time?