Template:Birth based on age at death

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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.