That is truly a difficult question to answer, for it is only answerable under a specific set of very limited and unrealistic definitions to hold reality to. One of these assumptions is that time moves forward. Is it that time moves forward, or is it that we move forward in time. Time could very well be a dimension like length, width, and depth, but it's too complicated to understand. Even if time all moved in the same direction, it would be foolish to assume that it moves at the same rate. For instance, an object that gets sucked in by a black hole will appear to be sucked into the black hole for all eternity, even after it is gone after being crushed by gravity. For time itself to be affected by gravity, for time to be relative to anything, proves that time is an illusion. Eventually, it may be proven that time is just an optical illusion, and that time is really just photons moving in space.
So... I guess this is a long way of saying: No. No one knows what time it is. And when someone does know, it will always be known, and always have been known.