Englische Gereimbook

The Englisch Calendar (Englische Gereimbook) is dated from Creation, not the Birth of Jesus. It is a lunisolar calendar, with a 19-year Metonic Cycle that determines when to insert a leap month on the calendar. The months start the night of the new moon, and each day begins at sundown and ends at sundown the next day.

Year
The year is calculated based on the chronology of the Bible according to the Septuagint. As anyone knows, there is no such thing as Year 0. So the first year is Year 1 of Creation.

Adam was created in Year 1. In Year 2, he had completed 1 year of life, so he was 1 year old in Year 2. Therefore, when the Bible said he was 230 years old when his son Seth was born, that is Year 231.

To put this in a more easily analyzed chart:
 * Adam: Born 1, Son born 231, died 931 at 930 yrs old.