Editing Template:Birth date and age/doc

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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.
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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 latter also has the shortcut: '''{{tl|Bda}}'''.


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}}.
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.


{{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.}}
Syntax:


== Usage ==
:<nowiki>{{Birth date|year of birth|month of birth|day of birth}}</nowiki>
; 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>
: <code><nowiki>{{</nowiki>bda|''year of birth''|''month of birth''|''day of birth''|''additional parameters''<nowiki>}}</nowiki></code>


; Named parameters for year, month, day
or
: <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 ===
:<nowiki>{{Birth date and age|year of birth|month of birth|day of birth}}</nowiki>
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'''.
:<nowiki>{{Bda|year of birth|month of birth|day of birth}}</nowiki>


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.
Examples:


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.
:<nowiki>{{Birth date|1993|2|4}}</nowiki> returns "{{Birth date|1993|2|4}}"
:<nowiki>{{Birth date|1993|2|04}}</nowiki> returns "{{Birth date|1993|2|04}}"
:<nowiki>{{Birth date|1993|2|24}}</nowiki> returns "{{Birth date|1993|2|24}}"


Do not specify both "df" and "mf" parameters in the same use of the template, as these formats are mutually exclusive.
:<nowiki>{{Birth date and age|1993|2|4}}</nowiki> returns {{Birth date and age|1993|2|4}}
:<nowiki>{{Birth date and age|1993|2|04}}</nowiki> returns {{Birth date and age|1993|2|04}}
:<nowiki>{{Birth date and age|1993|2|24}}</nowiki> returns {{Birth date and age|1993|2|24}}


=== Error tracking ===
===Month First (mf) and Day First (df) Options===
Some kinds of invalid input are tracked in [[:Category:Pages using age template with invalid date]].


=== Notes ===
The default output of this template is to display the month before the day. The majority of readers will see the date displayed this way because they aren’t logged in and therefore don't have accounts with a [[help:preferences#Date_format|date preference]] set. This default may not be appropriate articles about people from parts of the world where the day precedes the month in a date. In such articles the optional parameter, "df", can be set (to "y" or "yes" for example) to display the day before the month. Conversely the parameter "mf" can be set for month first, currently the default behaviour.
* '''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 ==
Examples:
; 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
:<nowiki>{{Birth date | 1993 | 2 | 24 | df=yes }}</nowiki> displays <!-- Don't remove "24_February|" from this example --> "[[24_February|24 February]] [[1993]]" to readers without a date preference.
: <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}}"
:<nowiki>{{Birth date and age | 1993 | 2 | 24 | df=yes }}</nowiki> displays <!-- Don't remove "24_February|" from this example --> "[[24_February|24 February]] [[1993]] (age {{Age|1993|2|24}})" to readers without a date preference.
: <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}}"
 
===hCard microformat===
 
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.
 
===Notes===
 
When only the 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 and death for privacy reasons, use the templates {{tl|Birth year and age}} and {{tl|Death year and age}} instead.
 
'''Note:''' The template will appear broken when the parameters are left blank (as seen above).
 
'''Note:''' Do not use this template inside of the [[WP:PERSONDATA|Persondata]] template as it can interfere with data extraction.
 
==See also==
*[[Wikipedia:Age calculation templates]]
*{{tl|BirthDeathAge}} &ndash; carries out the functions of this template and all the following ones
*{{tl|Birth date and age}} &ndash; same as {{tl|Birth date}}, except that "(age ##)" appears after the birth date
*{{tl|Birth year and age}} &ndash; year of birth and approximate age
*{{tl|Death date}}
*{{tl|Death date and age}} &ndash; same as {{tl|Death date}}, except that "(aged ##)" appears after the death date
*{{tl|Death year and age}} &ndash; year of death and approximate age at death
 
<includeonly>
 
<!-- PLEASE ADD CATEGORIES BELOW THIS LINE, THANKS. -->
 
[[Category:Date mathematics templates|{{PAGENAME}}]]
[[Category:Templates using ParserFunctions|{{PAGENAME}}]]
 
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[[bg:Шаблон:Дата на раждане и години]]
[[cs:Šablona:Datum narození a věk]]
[[da:Skabelon:Dato og alder]]
[[eo:Ŝablono:Naskiĝtago kaj aĝo]]
[[fi:Malline:Syntymäaika ja ikä]]
[[fr:Modèle:Date de naissance et âge]]
[[he:תבנית:תאריך לידה]]
[[ko:틀:출생일과 만나이]]
[[ja:Template:生年月日と年齢]]
[[no:Mal:Fødselsdato og alder]]
[[pt:Predefinição:Dni]]
[[ro:Format:Birth date and age]]
[[uk:Шаблон:Дата з віком]]
[[vi:Tiêu bản:Ngày sinh và tuổi]]
[[zh:Template:Birth date and age]]
</includeonly>
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