Birth and Death Date Calculators: Difference between revisions

Birth and Death Date Calculators (view source)

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-==Calculating Dates==
+==Calculating Dates Using Online Calculators==
+There are two ways to calculate a date from an age at death:<br>
+*30 day month method; example: 28 Apr 1864
+*exact month method; example: 30 Apr 1864
-Having exact birth and death dates for our ancestors helps us confirm our finds, as well as better identify them in other records. However, finding precise dates can be much more difficult as we research further back in time. We may only have our ancestor’s age (sometimes in the format of years/months/days) at time of death. Or, we may wish to know how old an ancestor would be from their birth date.  Using a date calculator can help us with the addition and subtraction necessary to discover our a more precise date. The date calculators listed above can help you determine that information.
+This can be explained with this example:
+Death date: 13 Mar 1870
+Age at death: 5 years 10 months, 13 days,
+Two answers can be given:
+Exact month method: 30 Apr 1864
+day month method: 28 Apr 1864
-'''''A genealogy Date Calculator needs to work the way genealogical records work - which is almost always by first subtracting the years, then subtracting the months, then subtracting the weeks, then subtracting the days.'''''
+===Which Way is Better?===
+That just depends on how you wish to calculate the date. The 30 day month method assumes that all months have 30 days, whereas the exact month method uses the exact amount of dyas for each month.<br>
-'''''NOTE: some date calculators use the reverse order, which will calculate a different date in many scenarios!'''''
+Although, the exact month method would be more accurate when calculating a date. Some believe that the dates and ages calculated and found on tombstones uses the 30 day month method.<ref> searchforancestors.com ''Tombstone Birthday Calculator'', http://www.searchforancestors.com/utility/birthday.html,  accessed 25 June 2021. Quote: "While you may think the exact calendar month method may be more reliable, be aware that many of the headstone and obituary ages at death appear to have been computed using the 30-day-month method. (The 30-day-month method assumes that all months have 30 days. It's an approximation which agrees with the exact calendar month method about 2/3 of the time.)"</ref>
 Records that may give an exact age at death and a death date can be found on: