In a perfect world, Barabra, it would have been the previous night! Unfortunately, since mass increases towards infinity as velocity approaches the speed of light, the force required to produce more acceleration also increases towards infinity, so the velocity of light can't be exceeded: thus no event can occur at a time not before its cause - QED. I hope this clears up any misunderstanding!

I suppose now some smart-arse out there will come back with the Unified Field Theory and make me look stupid?

Steve