How long has time been around?

Answer 1

Saying the words 'how long', we are asking the time period. Before time began, there was no time, and thus, even if it only started 100 million years ago, then that would be, say, forever, as before that time period, that was no time. So before time began, and there was no time, then there was nothing to calculate or even literally, the length of time that existed. Time, then, has been around forever, and if time ever stops, then this statement will no longer be able to make sense.