Lifespan 1000 years to 80?

[TubbyTubby]

basically it all boils down to counting the major events to signify planting and harvests which again could happen several times a year.

In short we don't know.

So when the bible talks about events lasting days or months, they are not days and months as we understand them either?

"And the ark rested in the seventh month, on the seventeenth day of the month, upon the mountains of Ararat."

When would the 'seventh month' have been do you think? If a year was not a year, a month must have been something else also. What was it?