Template documentation[view] [edit] [history] [purge]

This template calculates a person's approximate birth year based on their age at death. This is useful when a reliable source states only their age at death.
This can also be used when a person is dead and a reliable source states only their age at the time of publication, but their actual death date is not known.

Syntax

((Birth based on age at death|age|YYYY|MM|DD))

Example

((Birth based on age at death|93|1978|09|12)): 1884 or 1885
((Birth based on age at death|25|1846|01|04)): 1820 or 1821

Supporting template

This template is implemented using ((birth based on age as of date)) with |noage=1.

Birth, death and age templates

birth, death, age

Combined BDA template	Description / use
((BirthDeathAge))	Combines functions of ((Birth date)), ((birth-date)), ((birth date and age)), ((birth year and age)), ((death date)), ((death-date)), ((death date and age)), and ((death year and age)).

Birth templates	Description / use
((Birth date))	To display a birth date and related hidden metadata.
((Birth-date))
((Birth date and age))	((Birth date)) with suffix '(age N)'.
((Birth date and age2))	((Birth date and age)) plus age as of a specified date.
((Birth-date and age))	As ((Birth date and age)), but accepts dates in text form ('15 June 1950', 'June 15, 1950', 'June 1950', etc.).
((Birth date and age in years and days))	((Birth date and age)), but with the age displayed in years and days rather than just years.
((Birth year and age))	Year of birth and approximate age.
((Birth based on age as of date))	To display approximate birth year and current age given a particular date (e.g. when a dated reference mentions the age of a person), only works for living people.
((Birth based on age at death))	To display approximate birth year based on age at death, or on age at a specific date if death date isn't known.

Death templates	Description / use
((Death date))	To display a death date and related hidden metadata.
((Death-date))
((Death date and age))	((Death date)) with suffix '(aged N)'; also called with ((event date and age)).
((Death-date and age))	As ((Death date and age)), but accepts dates in text form ('15 June 1950', 'June 15, 1950', 'June 1950', etc.).
((Death date and given age))	To display a death date and specified age.
((Death year and age))	To display a year of, and approximate age at death.

age only

Conventional age templates	Description / use
((Age in years, months, weeks and days))	Number of complete years, months, weeks and days between two dates.
((Age in years, months and days))	Number of complete years, months and days between two dates.
((Age in years and months))	Number of complete years and remaining months between two dates.
((Age in years and days))	Number of complete years and remaining days between two dates.
((Age in years and days nts))	((Age in years and days)) with output formatted for use in number sortable tables.
((Age in decimal years))	Number of years between two dates, rounded to the specified number of decimal places.
((Age in years))	Number of years between two dates.
((Age in years nts))	((Age in years)) with output formatted for use in number sortable tables.
((Age in months))	Number of months between two dates.
((Age in weeks and days))	Number of weeks and days between two dates.
((Age in weeks))	Number of weeks between two dates.
((Age in days))	Age in days between two dates.
((Age in days nts))	((Age in days)) with output formatted for use in number sortable tables.

Reverse-determined age template	Description / use
((Age))	Age based on number of complete years between two dates.
((Age nts))	((Age)) with output formatted for use in number sortable tables.
((Age as of date))	Current age (in years) from a known age at a specified date.
((Age for infant))	Current age for infant: months and days up to one year, years and months up to three years, and years beyond age 3.

start / end dates

Date-focused templates	Description / use
((Start date)) / ((End date))
((Start-date)) / ((End-date))
((Start date and age))
((End date and age))

miscellaneous

Template	Description / use
((OldStyleDate))	Dates in Julian calendar.
((OldStyleDateDY))	As ((OldStyleDate)) but used when Julian / Gregorian dates fall in different years.
((OldStyleDateNY))	As ((OldStyleDate)) but without the year.
((Unidentified for))
((Missing for))

The above documentation is transcluded from Template:Birth based on age at death/doc.
Editors can experiment in this template's sandbox and testcases pages.
Add categories to the /doc subpage. Subpages of this template.