NKJV - 16 After he begot Jared, Mahalalel lived eight hundred and thirty years, and had sons and daughters.
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I thought the Jewish calendar was a lunar one and it ended up being a 354 day year with adjustments later to match modern solar based calendars. I base this mostly on a website called Judaism 101. Just wondering what was right.
My opinion is that the year was roughly 360 days following the Jewish calendar. They followed a lunar calendar instead of a solar calendar. There is calendar correction somehow through Sabbath years and Jubilee years.