How to Reconstruct the Chronology?

Even week days can't be reconciled with the because once a date given, you have to establish an absolute date in the history. But we are failed, repeatedly failing to even let us forget about the week day. Now then, based on the various algoritms, almost we can go back to thousand years back. We can calculate exactly eclipse, the date also, no but we failed to establish. Then i found one copper plate curtacoti, that refers to a total solar eclipse. Not only the eclipse, he gives the exact date, time. And he says that around noontime, that eclipse ended, and the king e took bath and then make the donation