Calculates birthdate from death date and age of death in day/month/year format.
Assumes New Year on Jan. 1.
This new version can use two different computation methods: (the 28-day-month calculation has been removed due to some problems with the logic and its general uselessness)
Please see my explanation of birthdate calculation methods, and keep in mind that due to uncertainty as to which calculation method was originally used and due to possible errors in the original calculation, calculated dates should be considered to be accurate only to within a few days unless you have good reason to be more confident in them. It is not unusual to encounter original calculation errors as large as 1 month, so beware!
This JavaScript utility uses tables, the forms interface, and of course JavaScript. As far as I know, only Netscape after 2.0 and maybe a few more advanced browsers (like MS InternetExplorer) support this, and then only on some versions and platforms.
Please report any problems to Ben Buckner, but first make sure you're not just reading something wrong.