Fyrimynd:Birth based on age as of date/doc

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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[rætta wikitekst]

 {{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.

If they are not known, the "day" and "month" fields can be omitted; this is useful if, for example, only the publication year for a source is known.

Options[rætta wikitekst]

To suppress the age field:

 {{birth based on age as of date |age |year|month|day |noage=1}} 

With the "noage=1" option, the month and day can be "1".

Examples[rætta wikitekst]

If, for example, a reference dated July 4, 2018 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 |2018|July|4}}

The following examples are for a person reported as being 50 years old in 2018

Template code Result
{{birth based on age as of date5020180825}} 1967/1968 (age 51)
{{birth based on age as of date502018august25}} 1967/1968 (age 51)
{{birth based on age as of date5020181231}} 1967/1968 (age 50–51)
{{birth based on age as of date502018Jan1}} 1967/1968 (age 51–52)
{{birth based on age as of date5020181231noage=1}} 1967/1968
{{birth based on age as of date502018Jan1noage=1}} 1967/1968
{{birth based on age as of date502018august}} 1967/1968 (age 50–52)
{{birth based on age as of date502018Jan}} 1967/1968 (age 51–52)
{{birth based on age as of date50201812}} 1967/1968 (age 50–51)
{{birth based on age as of date502018}} 1967/1968 (age 50–52)