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This template will return a living person's date of birth and age. Using this template rather than simply inserting the date into articles allows for the inclusion of hidden metadata about the date. This metadata can be used by web browsers and other software tools to extract the details, and display them using some other website or mapping tool, index, or search them.
{{mergefrom|Hcard-bday|Template_talk:Birth_date_and_age#Edit_request}}
<includeonly>{{template doc page transcluded|Template:Birth date and age}}</includeonly>
<noinclude>{{template doc page viewed directly}}</noinclude>
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== Usage ==
 
These templates ('''{{tl|Birth date}}''' and '''{{tl|Birth date and age}}''') return a person's date of birth and optionally his/her age. The later also have the shortcut: '''{{tl|Bda}}'''.
 
Using this template rather than simply inserting the date into articles allows for the inclusion of hidden [[metadata]] about the date. This metadata can be used by web browsers and other software tools to extract the details, and display them using some other website or mapping tool, index or search them.
 
Syntax:
 
:<nowiki>{{Birth date|year of birth|month of birth|day of birth}}</nowiki>
 
or
 
:<nowiki>{{Birth date and age|year of birth|month of birth|day of birth}}</nowiki>
:<nowiki>{{Bda|year of birth|month of birth|day of birth}}</nowiki>


This template is intended for use in an article about a living person. For an article about a dead person, use {{tl|Birth date}} with {{tl|Death date and age}}.
Examples:


{{notice|text='''Is the displayed age incorrect?'''<br>The age displayed was calculated when the page was last purged. If a particular article is showing the wrong age, edit the whole page and publish the edit without making any change and with no edit summary. That will update the age. The page can also be purged by appending <code>&action=purge</code> to the URL.}}
:<nowiki>{{Birth date|1993|2|24}}</nowiki> returns "{{Birth date|1993|2|24}}"


== Usage ==
:<nowiki>{{Birth date and age|1993|2|24}}</nowiki> returns {{Birth date and age|1993|2|24}}
; Unnamed parameters for year, month, day
 
: <code><nowiki>{{</nowiki>Birth date and age|''year of birth''|''month of birth''|''day of birth''|''additional parameters''<nowiki>}}</nowiki></code>
An optional parameter, df, can be set (to "y" or "yes" for example) to display the day before the month. This is primarily used in articles about people from parts of the world where the day precedes the month in a date. Conversely the (unimplemented) parameter mf can be set for month first, currently the default behaviour.
: <code><nowiki>{{</nowiki>bda|''year of birth''|''month of birth''|''day of birth''|''additional parameters''<nowiki>}}</nowiki></code>
 
Examples:
 
:<nowiki>{{Birth date|1993|2|24|df=yes}}</nowiki> returns "{{Birth date|1993|2|24|df=yes}}"
 
:<nowiki>{{Birth date and age|1993|2|24|df=yes}}</nowiki> returns "{{Birth date and age|1993|2|24|df=yes}}"
 
The templates also return the date, hidden by CSS, in the [[ISO 8601]] format needed by [[HCard|hCard microformat]]s. for example:
 
:<nowiki>(<span class="bday">1993-02-24</span>)</nowiki>
 
See [[WP:UF|the microformats project]] for details.


; Named parameters for year, month, day
'''Note:''' The template will appear broken when the parameters are left blank (as seen above).
: <code><nowiki>{{</nowiki>Birth date and age|year=''year of birth''|month=''month of birth''|day=''day of birth''|''additional parameters''<nowiki>}}</nowiki></code>
: <code><nowiki>{{</nowiki>bda|year=''year of birth''|month=''month of birth''|day=''day of birth''|''additional parameters''<nowiki>}}</nowiki></code>


=== Additional parameters ===
==See also==
The '''df''' (day first) and '''mf''' (month first) parameters indicate the intended date format to display. The appropriate parameter should be set to "y" or "yes" e.g. '''df=yes''' or '''mf=y'''.


The default output of this template is to display the month before the day. This default may not be appropriate for articles about people from parts of the world where the day precedes the month in a date. In such articles the parameter, "df", should be set to display the day before the month.
* [[Template:Death date and age]] – similar, for death date (and age at death)


The parameter "mf", while not actually used by the template, will indicate that month first format is intended. Using these parameters can assist [[WP:BOT|bots]] or other automated processing to detect which date format is intended; leaving the format as default may lead an editor or bot to change the format to an unintended value.
<includeonly>


Do not specify both "df" and "mf" parameters in the same use of the template, as these formats are mutually exclusive.
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=== Error tracking ===
[[Category:Templates using ParserFunctions|{{PAGENAME}}]]
Some kinds of invalid input are tracked in [[:Category:Pages using age template with invalid date]].


=== Notes ===
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* '''Do not use with non-Gregorian dates''' because the resulting hCard hidden date will be false.
* The template will appear broken when the parameters are left blank.
* When only the month or year of a person's birth and/or death are known, or if it is desired not to state a person's full dates of birth for privacy reasons, consider using the templates {{tl|Birth year}} or {{tl|Birth year and age}} instead.


== Examples ==
[[fr:Modèle:Date de naissance et âge]]
; Unnamed parameters for year, month, day
: <code><nowiki>{{Birth date and age|1993|2|24}}</nowiki></code> returns "{{Birth date and age|1993|2|24}}"
: <code><nowiki>{{Birth date and age|1993|2|24|df=yes}}</nowiki></code> returns "{{Birth date and age|1993|2|24|df=yes}}"
: <code><nowiki>{{Birth date and age|1993|2|24|mf=yes}}</nowiki></code> returns "{{Birth date and age|1993|2|24|mf=yes}}"


; Named parameters for year, month, day
</includeonly>
: <code><nowiki>{{Birth date and age|year=1993|month=2|day=24}}</nowiki></code> returns "{{Birth date and age|year=1993|month=2|day=24}}"
: <code><nowiki>{{Birth date and age|year=1993|month=2|day=24|df=yes}}</nowiki></code> returns "{{Birth date and age|year=1993|month=2|day=24|df=yes}}"
: <code><nowiki>{{Birth date and age|year=1993|month=2|day=24|mf=yes}}</nowiki></code> returns "{{Birth date and age|year=1993|month=2|day=24|mf=yes}}"
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