I've been working with pencil and paper, fingers and toes, and have not been able to solve this puzzle. I'm hoping that someone on this mailing list has already found the answer. How does one calculate a person's age as is often seen on old tombstones, with the years, months and days? I am including two examples for which I have each person's birth and death dates, but I can't come up with the same result as shown on the stones. Did they include calculations for leap years? February (28 days), months with 30 days, 31 days? Did they use a Julian calendar? Understanding this method of calculation would be helpful when one has only the information on a tombstone from which to calculate a person's date of birth. Jesse Hadley died in Hancock County on Sept. 7, 1859. His stone said that his age was 74 years, 11 months, 20 days. From other documented resources, I believe his birthdate was Sept 13, 1784. Lucinda Lawrence Hadley died in Hancock County on Jan. 29, 1860, at the age, also according to her stone, of 70 years, 9 months, 10 days. Her birthdate was April 19, 1790. If someone can provide an answer or point me at a website, I'd appreciate it. Marcia Farina Majorville@aol.com