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Birthdate Calculator

Birthdate Calculator

Posted: 1370776025000
Classification: Query
This would be a welcome addition to the site.

For those who might not own a software program with this feature, I recently found one online which you can use...

Re: Birthdate Calculator - Caution With Old Style / New Style Complications

Posted: 1370802604000
Classification: Query
Edited: 1370866308000
I might point out a caution that this calculator does not handle calculations involving a birth in America before 09/3/1752 and death after 09/13/1752. (Born in old style calendar, died new style calendar. Nobody was born 09/03/1752-09/13/1752 in America. If you have a record that says they were, it is probably an old-style date, or just wrong.)

For example, a person exactly 20 years old when he died on 03/01/1760, was born 02/18/1739/40. (Counting 11 days backwards from 02/28/1739/40, including the 28th. To prove: 18+11=29, or 03/01/1739/40 (new style birthday). Note Feb 1739/40 was not a leap year but Feb 1740/41 was.)

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