Is It Possible That the Decimal System, Zero, Etc, May Have Happened at That Time?

If we go back about 5000 years before today, we have this so-called Harapan phase of our civilization. It indicates that there was already a very advanced degree of knowledge at the time. So, it is possible that the invention of the discovery or invention of the decimal system, zero, etc, may have happened at that time or even before that. The issue is, you know, to pinpoint a date, which is very, very difficult at this stage.