All UNIX based computer systems (UNIX/Linux) and maybe even Microsoft as well, calculate time in seconds or microseconds from an agreed upon moment in time, know as "the epoch".
That moment in time is 01/01/1970 00:00
I have been a UNIX software consultant for 20 years. You can take my word on this, or better yet, here's a
link.
But was he talking about a date-stamp from a computer? I thought the BC’s were stamped by a Bates stamp. I really wish I could hear what was being said. He was talking about the sequence of the BC#’s, wasn’t he?