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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.
{{Documentation subpage}}<includeonly>
{{#ifeq:{{#titleparts:{{PAGENAME}}|1}}|Birth date and age
| {{High-risk|470,000+}} <!--(Template:Birth date and age)-->
| {{High-risk|210,000+}} <!--(Template:Birth date)-->
}}</includeonly>
<!-- PLEASE ADD CATEGORIES WHERE INDICATED AT THE BOTTOM OF THIS PAGE -->
{{Warning |''Do '''NOT''' use this template when the person's exact date of birth is disputed or unknown; consider {{tl|birth year and age}} instead.''}}


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}}.
The '''{{tl|Birth date}}''' and '''{{tl|Birth date and age}}''' templates will return a person’s date of birth and optionally his/her age. They have the shortcuts '''{{tl|dob}}''' and '''{{tl|bda}}''', respectively.


{{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.}}
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.


== Usage ==
===Syntax===
; Unnamed parameters for year, month, day
====To display the birth date only====
: <code><nowiki>{{</nowiki>Birth date and age|''year of birth''|''month of birth''|''day of birth''|''additional parameters''<nowiki>}}</nowiki></code>
: <code><nowiki>{{Birth date|year of birth|month of birth|day of birth|additional parameters}}</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
'''Do not use with non-Gregorian dates''' because the resulting hCard hidden date will be false.
: <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 ===
===={{tl|dob}} is a redirect to {{tl|Birth date}}====
: <code><nowiki>{{dob|year of birth|month of birth|day of birth|additional parameters}}</nowiki></code>
 
====To display a birth date with calculated age====
: <code><nowiki>{{Birth date and age|year of birth|month of birth|day of birth|additional parameters}}</nowiki></code>
 
'''This form is only intended for living persons.''' For dead persons, use {{tl|birth date}}. In the rare case that a living person's birth date is given in a non-Gregorian calendar this template should not be used. The parameter names 'year', 'month', and 'day' can be used instead of the first, second, and third parameters for 'Birth date and age' only. These parameter names are not available for the 'Birth date' template.
However, as per [[WP:DOB]], a full birth date for a living person should '''only''' be displayed when it can be cited as being '''widely''' published, or published with the clear approval of the person involved. Otherwise, use {{tl|birth year and age}} instead.
 
===={{tl|Bda}} is a redirect to {{tl|Birth date and age}}====
: <code><nowiki>{{Bda|year of birth|month of birth|day of birth|additional parameters}}</nowiki></code>
 
Examples
: <code><nowiki>{{Birth date|1993|2|4|df=yes}}</nowiki></code> returns "{{Birth date|1993|2|4|df=yes}}"
: <code><nowiki>{{Birth date|1993|2|4|mf=yes}}</nowiki></code> returns "{{Birth date|1993|2|4|mf=yes}}"
: <code><nowiki>{{Birth date|1993|2|4}}</nowiki></code> returns "{{Birth date|1993|2|4}}"
: <code><nowiki>{{Birth date|1993|2|24|df=yes}}</nowiki></code> returns "{{Birth date|1993|2|24|df=yes}}"
: <code><nowiki>{{Birth date|1993|2|24|mf=yes}}</nowiki></code> returns "{{Birth date|1993|2|24|mf=yes}}"
: <code><nowiki>{{Birth date|1993|2|24}}</nowiki></code> returns "{{Birth date|1993|2|24}}"
 
: <code><nowiki>{{Birth date and age|1993|2|4|df=yes}}</nowiki></code> returns {{Birth date and age|1993|2|4|df=yes}}
: <code><nowiki>{{Birth date and age|1993|2|4|mf=yes}}</nowiki></code> returns {{Birth date and age|1993|2|4|mf=yes}}
: <code><nowiki>{{Birth date and age|1993|2|4}}</nowiki></code> returns {{Birth date and age|1993|2|4}}
: <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}}
: <code><nowiki>{{Birth date and age|1993|2|24}}</nowiki></code> returns {{Birth date and age|1993|2|24}}
 
===="month first" (mf) and "day first" (df) options====
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 '''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'''.


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Do not specify both "df" and "mf" parameters in the same use of the template, as these formats are mutually exclusive.
Do not specify both "df" and "mf" parameters in the same use of the template, as these formats are mutually exclusive.


=== Error tracking ===
Examples
: <code><nowiki>{{Birth date|1993|2|24|df=yes}}</nowiki></code> displays "{{Birth date|1993|2|24|df=yes}}".
: <code><nowiki>{{Birth date and age|1993|2|24|df=yes}}</nowiki></code> displays "{{Birth date and age|1993|2|24|df=yes}}".
: <code><nowiki>{{Birth date|1993|2|24|mf=yes}}</nowiki></code> displays "{{Birth date|1993|2|24|mf=yes}}".
: <code><nowiki>{{Birth date and age|1993|2|24|mf=yes}}</nowiki></code> displays "{{Birth date and age|1993|2|24|mf=yes}}".
 
===hCard microformat===
The templates also returns the date, hidden by CSS, in the [[WP:ISO 8601|ISO 8601]] standard.<ref>{{cite web | date = April 7, 2013 | url = http://microformats.org/wiki/date-pattern | title = Date Design Pattern | website = Microformats Wiki}}</ref>
<ref>{{cite web | date = August 28, 2009 | url = http://microformats.org/wiki/hcalendar-issues-closed | title = hCalendar closed issues | website = Microformats Wiki}} Specifically rejects supporting the Julian calendar.</ref> For example:
: <code><nowiki>(<span class="bday">1993-02-24</span>)</nowiki></code>
Note: For the "foundation", "built" and similar set-up dates of companies, buildings etc., use {{tl|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 [[Wikipedia:WikiProject Microformats|the microformats project]].
 
===Notes===
* The template will appear broken when the parameters are left blank (as seen above).
 
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.
 
===Error tracking===
Some kinds of invalid input are tracked in [[:Category:Pages using age template with invalid date]].
Some kinds of invalid input are tracked in [[:Category:Pages using age template with invalid date]].


=== Notes ===
==See also==
* '''Do not use with non-Gregorian dates''' because the resulting hCard hidden date will be false.
*{{tl|Birth date}}
* The template will appear broken when the parameters are left blank.
*{{tl|Recent birth}}
* 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.
 
===References===
{{reflist}}
 
===TemplateData===
{{TemplateDataHeader}}
<templatedata>
{
"description": "This template returns a living person's date of birth and current age.",
"params": {
"1": {
"label": "Year of birth",
"description": "The year in which the person was born",
"type": "number",
"required": true,
"aliases": [
"year"
]
},
"2": {
"label": "Month of birth",
"description": "The month (number) in which the person was born",
"type": "number",
"required": true,
"aliases": [
"month"
]
},
"3": {
"label": "Day of birth",
"description": "The day (number) in which the person was born",
"type": "number",
"required": true,
"aliases": [
"day"
]
},
"df": {
"label": "Day first",
"description": "When set to 'y' or 'yes', the date of birth is output in a DMY format",
"type": "string",
"required": false
},
"mf": {
"label": "Month first",
"description": "When set to 'y' or 'yes', stresses that the default MDY date format is intended for the date of birth",
"type": "string",
"required": false
}
}
}
</templatedata>
 
 
{{Birth, death and age templates}}


== Examples ==
<includeonly>{{#ifeq:{{SUBPAGENAME}}|sandbox |
; Unnamed parameters for year, month, day
| {{#switch:{{BASEPAGENAME}}
: <code><nowiki>{{Birth date and age|1993|2|24}}</nowiki></code> returns "{{Birth date and age|1993|2|24}}"
  |Birth date |Death date = [[Category:Templates generating microformat dates]]
: <code><nowiki>{{Birth date and age|1993|2|24|df=yes}}</nowiki></code> returns "{{Birth date and age|1993|2|24|df=yes}}"
  | [[Category:Templates generating microformat date and age]]
: <code><nowiki>{{Birth date and age|1993|2|24|mf=yes}}</nowiki></code> returns "{{Birth date and age|1993|2|24|mf=yes}}"
  }}
<!----- CATEGORIES BELOW THIS LINE, PLEASE: ----->
[[Category:Date mathematics templates]]


; Named parameters for year, month, day
[[el:Πρότυπο:Ημερομηνία γέννησης και ηλικία]]
: <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}}"
[[my:Template:Birth date and age]]
: <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}}"
}}</includeonly>
: <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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