|  | 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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