Thanks Ken G for making it clearer on the "first" moment.
But still it looks abit fuzzy as far as the first "event" is concerned- as BBT is certainly a theory of cosmic evolution- and with "BB as the origin of our universe" as one of its major aspects(absolutely this model purported by BBT is...
BBT simply says that the "very" first event of our cosmos was the Big bang. And that implies that all the set of events were followed by it.
Now our 4th dimension-Time is nothing but a dimension that accounts for just occurrence of events (suppose if any how you can stop "each n every" event of...
as far as the current BBT model is concerned--No there was no existence of either Time or Space before BB.
it might surely sound weird to even imagine of a primeval atom existence without space n time, but that's where our common sense interferes where we readily imagine of any entity placed in...