Template:Birth-date and age Source: en.wikipedia.org/wiki/Template:Birth-date_and_age

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This template is used on approximately 14,000 pages and changes may be widely noticed. Test changes in the template's /sandbox or /testcases subpages, or in your own user subpage. Consider discussing changes on the talk page before implementing them.

This template uses Lua:

Module:Check for unknown parameters (sandbox)

{{Birth-date and age}} displays a person's birth date and age. Besides calculating the age of the person, the benefit of using this template is to allow for the inclusion of hidden microformat dates, which may be indexed or searched by software tools.

Note: The template may not calculate the age correctly if a full date (month, day, year) is not provided. For example, a person who was born in 1941 could be either 83 or 84, depending on whether they have reached their birthday in the current year:

{{Birth-date and age|1941}} → 1941 (age 84)

{{Birth-date and age|June 1941}} → June 1941 (age 84)

When only the year is known, consider using {{Birth year and age}} instead:

{{Birth year and age|1941}} → 1941 (age 83–84)

{{Birth year and age|1941|6}} → June 1941 (age 83–84)

Usage

{{Birth-date and age|birth date}}
{{Birth-date and age|birth date|wikitext to display in place of 'birth date'. Like the right hand parameter in a wikilink, this could be alternate text, links, templates etc.}}

Parameters

Parameter	Status	Description	Default
`\|1=`	required	Birth date. May be year only, year and month, year month and day, expressed in natural formats: e.g.: 24 August 1953, 1955-08-25, Sunday, December 7, 1941. If parameter three is not specified, the birth date is displayed in exactly this format. This value as well as parameter 2 may not include links. If links or templates that do not evaluate as recognizable dates are desired, use parameter 2.	–
`\|2=`	optional	The birth date to display. This may include links or templates, or any combination of them, and overrides parameter 1.	`\|1=`
`\|bce=`	optional	If birth date is BC, set to "b".	–
`\|gregorian=`	optional	If Julian date is used, this parameter is required. The date provided is used for emitting the correct microformat translation of the birth date.	`\|1=`
`\|dt=`	optional	This value if present is the ISO8601 value emitted to indicate microformat birth date. It overrides any calculated value.	–

hCard microformat

This template also returns the date, hidden by CSS, in the ISO 8601 standard.^[1] ^[2] For example:

(<span class="bday">1993-02-24</span>)

Note: For the "foundation", "built" and similar set-up dates of companies, buildings etc., use {{start date}} (this will work for year-only or month-year dates). Because the ISO 8601 standard requires the Gregorian calendar, this template should not be used if the date is given in the Julian calendar.

For further information, visit the microformats project.

Examples

**Examples of {{Birth-date and age}}** *(colors for emphasis only)*
Month first format: Sample below displays April 12, 1941 (1941-04-12) (age 84), with invisible microformat date: 1941-04-12 `{{Birth-date and age\|April 12, 1941}}`
Day first format: Sample below displays 12 April 1941 (1941-04-12) (age 84), with invisible microformat date: 1941-04-12 `{{Birth-date and age\|12 April 1941}}`
Year only, year and month only: Sample below displays 1941 (1941) (age 84), with invisible microformat date: 1941 `{{Birth-date and age\|1941}}`
Demo of ISO date, as well as alternate displays. Sample below displays Twelfth of April, 1941 (1941-04-12) (age 84), with invisible microformat date: 1941-04-12 `{{Birth-date and age\|1941-04-12\|Twelfth of April, 1941}}`

TemplateData

This is the TemplateData for this template used by TemplateWizard, VisualEditor and other tools. See a monthly parameter usage report for Template:Birth-date and age in articles based on its TemplateData.

TemplateData for Birth-date and age

Template parameters[Edit template data]
Parameter		Description	Type	Status
1	`1`	no description	Unknown	required
2	`2`	no description	Unknown	optional
bce	`bce`	no description	Unknown	optional
gregorian	`gregorian`	no description	Unknown	optional
dt	`dt`	no description	Unknown	optional

Microformat output

Birth date and age templates:

{{Birth-date and age|31 December 2016}} → 31 December 2016 (age 8)

31 December 2016<span style="display:none">&#160;(<span class="dtstart bday">2016-12-31</span>)</span> (age&nbsp;<span class="currentage"></span>8)

{{Birth date and age|2016|12|31|df=y}} → 31 December 2016 (age 8)

<span style="display:none"> (<span class="bday">2016-12-31</span>) </span>31 December 2016<span class="noprint ForceAgeToShow"> (age&nbsp;8)</span>

Supporting templates

Alternative template

Template:Birth date and age (The name of the alternative template does not have a hyphen after "Birth".)

Tracking categories

Category:Pages using Birth-date and age with unknown parameters (0)
Category:Date of birth not in Wikidata (21,058) – added by Template:Birth-date
Category:Articles without Wikidata item (127) – added by Template:Birth-date and other templates