2 thoughts on “Days Between Dates

  1. Louise Hanson


    Is WolframAlpha or any other site able to calculate an earlier date using a date and a number of years, months, weeks, and days. For instance, Mary if died on 23 February 1889 and was 39 years, 6 month, and 14 days old, what was her birthdate? I have run into this using obituaries and funeral notices, where they don’t give a birthdate, just how old a person was when they died. I have calculated by counting back, but it can be time-consuming as you need to be sure to calculate in leap years.



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