Time is just what we use on earth. The whole universe is time yet black holes can actually bend space and time. So In My OPINION time is nothing but everything. We are sections in time each one of us has a trail of life of time if you will. What did you do 5 minutes ago? Well whatever it was you know you where there and in time. So there must be time if we are moving trough it without time no one would age or die.

We ourselves have a black hole at the center of our galaxy, that is slowly i mean slowly pulling us into oblivion. This creates time along with earths rotation, im sure there is something im leavin out, but just trying to get point out. Time is the beggining middle and end. There is more on this in the study of quantum mechanics very interesting stuff i might ad. heck out time zero when reaching light speed at 84k miles per second.