Let me tell you why E = m c ^ 2, relativistic energy, can never be proved wrong. First of all, Otto Hahn got the Nobel Prize in Physics for Nuclear Fission Process. read more
There is no way that E = m c ^ 2 can ever be proved wrong. If that happens, Physics Concepts for photons and General Theory Of Relativity will get collapsed. Nuclear Fission Process will be proved wrong. This, I highly doubt will ever happen. read more
A. Einstein’s famous equation works. It describes reality. If it should turn out that there is a better way to describe reality, then that way will be adopted and the boundaries of our understanding and knowledge will have expanded. read more
Also the time at which the event happens is not the same as the time it happens in my frame. The transformation from the coordinates in my frame to the coordinates in your frame are given by: x' = gamma (x - v t) y' = y z' = z t' = gamma (t - v x/c^2) where: gamma = 1/sqrt(1-v^2/c^2) t' is the time the event happens according to your clock. read more