Template:Birth-date and age

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{{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 77 or 78, depending on whether they have reached their birthday in the current year:

{{Birth-date and age|1941}} → 1941 (1941) (age 78)
{{Birth-date and age|November 1941}} → November 1941 (1941-11) (age 78)

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

{{Birth year and age|1941}} → 1941 (age 77–78)
{{Birth year and age|1941|11}} → November 1941 (age 77–78)

Usage[change source]

Format
{{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. }}

Examples[change source]

Examples of {{Birth-date and age}} (colors for emphasis only)
Month first format: Sample below displays April 12, 1941 (1941-04-12) (age 78), 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 78), 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 78), 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 78), with invisible microformat date: 1941-04-12
{{Birth-date and age|1941-04-12|Twelfth of April, 1941}}

Parameters[change source]

{{birth-date and age|birth date|additional parameters}}
Parameter Default
(required) 1 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.
(optional) 2 The birth date to display. This may include links or templates, or any combination of them, and overrides parameter 1. parm 1
(optional) bce If birth date is BC, set to "b".
(optional) gregorian If Julian date is used, this parameter is required. The date provided is used for emitting the correct microformat translation of the birth date. parm 1
(optional) dt This value if present is the ISO8601 value emitted to indicate microformat birth date. It overrides any calculated value.