Reply To: The Missing 165 Years – Discrepancy Between Jewish and Secular Calendars

From Ohr Samayach (ohr.edu):

…

As far as the year 6000 is concerned, it is simply an upper limit — i.e., by the year 6000 the Mashiach will already be here. But that’s not to say that it can’t happen sooner.

In these matters, says the Rambam, no one knows exactly what will happen until it happens. The Rambam cautions against being preoccupied with Midrashim about Mashiach, since ultimately such things add nothing to one’s love and awe of Hashem.

Sources:

Rambam Hilchot Melachim 11:1,4 12:2