| 1. | Kiddinu's value for the solar year is in use for today's calendars.
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| 2. | This put the country ten solar years behind the standard Muslim calendar.
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| 3. | This is because the solar year cannot be evenly divided into 24-hour segments.
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| 4. | Historically they were used to accurately determine the length of the solar year.
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| 5. | They also knew that five of these Venus cycles equaled eight solar years.
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| 6. | The Eblaite calendars were based on a solar year divided into twelve months.
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| 7. | The Lunar Year + 7 day week + 4 days = Solar Year.
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| 8. | In this way 19 Jewish years will be virtually equivalent to 19 solar years.
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| 9. | Nevertheless, the Roman calendar contained very ancient remnants of a pre-Etruscan 10-month solar year.
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| 10. | A common purely lunar calendar is the solar year approximately every 33 Islamic years.
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