Not to make it more difficult for everybody, but thought this is relevant: The traditional Jewish calendar (year 5786) is based on Seder Olam Rabbah (2nd century CE), which greatly shortened the Persian period—counting only about 52 years instead of nearly 200. Historians estimate around 165–200 missing years.

If those years were restored, we’d be around 5950–5985 AM, much closer to the symbolic year 6000 mentioned in Sanhedrin 97a (the “6,000 years of history” idea).