Template:Birth based on age as of date/doc

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< Template:Birth based on age as of date
Revision as of 03:56, 6 March 2012 by imported>Zyxw (see also)
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Usage

This template calculates the birth year and current age based on the age as of a date. This is useful when a reference states only their age at the time of the reference's publication.

Syntax

{{Birth based on age as of date|age|year|month|day}}

The age, year, and day must be supplied as natural numbers; month can be specified as a natural number as well as by name or abbreviation (e.g. "August" or "Aug"). The Gregorian calendar is assumed, with no special support provided for dual dating or the difference between Old Style and New Style dates .

Examples

For example, if a reference dated July 4, 2025 mentions that someone is 50 years old, that person's birth year and age can be rendered using

{{Birth based on age as of date|50|2025|July|4}}

The following examples use a date which is exactly one year ago:
26 January 2026

Template text Result
{{Birth based on age as of date|50|2025|1|26}} 1974/1975 (age 51)
{{Birth based on age as of date|50|2025|January|26}} 1974/1975 (age 51)
{{Birth based on age as of date|50|2025|1|15}} 1974/1975 (age 51–52)
{{Birth based on age as of date|50|2025|Nov|5}} 1974/1975 (age 50–51)

See also

Birth date/year/age
  • {{Birth date}} — displays the date and related hidden metadata
  • {{Birth date and age}} — same as {{Birth date}}, except that "(age ##)" appears after the birth date
  • {{Birth date and age2}} — displays an individual's birth date, plus his or her age as of a specified date. In this template, "(aged ##)" appears after the birth date
  • {{Birth year and age}} — year of birth and approximate age
Death date/year/age
Age
  • {{Age}} — age based on the number of full years between two dates (or a specified date and current date)
  • {{Age nts}} — similar to the above, but will sort correctly in sortable tables
  • {{Age in years and days}} – full years and days between two dates (or a specified date and current date)
  • {{Age in days}} — age in days between two dates (or a specified date and current date)
  • {{Age as of date}} — current age in years, based on a known age as of a specified date