This 30 day month method would have been the easiest way for the individual to calculate the date for the tombstone inscription. Which Method Should be Used? Īlthough, the calendar month method may take into account the correct number days of the month, it is a common belief that the 30-day-month method or the 8870 hand method used for years before calculators is the method most often used. 30 day month method: (matches 8870 method).Subtract years first, then months and days:.Subtract days first, then months and years:.30 day month method (also known as 8870 method).Subtract years first, then months and days.Subtract days first, then months and years.In addition, the calendar month method can be done two ways:.

There are different ways to calculate a date from an age at death: The method used by the calculator will give you different results. There are several different kinds of calculators to use in determining a person's birth or death date. This requires a calculator to be used to determine the birthdate. Sometimes a birthdate is not know and the date of death with the age listed in Years-months-days is provided. Has options to use calendar month method (subtracts days first) or 30 day month method (8870 method)Ĭalculating Birth Dates This calculator allows Julian calendar or Gregorian dates to help you calculate birth date from age at date of death. Shows results from subtracting years first AND shows results subtracting days first, if different.

Used to determine birthdate from age at deathĬalculates birthdate from age at death and age at death from birth and death date Instructions Used to determine age from birth date and death date Includes the calendar month method (subtracts days first) or the 30 day month method (8870 method) Used to calculate birthdate using date of death and age calculate age of death with birthdate and death date calculate death with only the year of birth and death. Online Birth and Death Date Calculators Links

4 How to calculate by hand - Estimated date.

1 Online Birth and Death Date Calculators.

Calculate death date using astrology