For those who are researching their families and find tombstones with inscriptions such as: Died March 22, 1889 - age 77 years 7 months 11 days AND you would like to know their BIRTHDATE. The following URL will do the calculation for you and give you an accurate birthdate EVERY TIME. BTW: The Birthdate for the example above: 11 Aug 1811 Internet address is: http://enws347.eas.asu.edu:8000/~buckner/bdform.html <A HREF="http://enws347.eas.asu.edu:8000/~buckner/bdform.html">Click here: Birthdate Calculator</A>