编辑“︁模板:Start date and age/doc”︁

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{{High-use}}
{{COinS safe|n}}
{{Template shortcut|sda}}
{{Lua|Module:Check for unknown parameters|Module:Date time}}

{{tlb|Start date and age}} displays the date that an event or entity started or was created. It also includes a duplicate, machine-readable date in the [[ISO 8601]] format (which is hidden by [[CSS]]), for use inside other templates which emit [[microformat]]s. The hidden date degrades gracefully when CSS is not available.

== Usage ==
* {{tlx|Start date and age|{{var|YYYY}}|{{var|MM}}|{{var|DD}}}} (year, month, and day)
* {{tlx|Start date and age|{{var|YYYY}}|{{var|MM}}|{{var|DD}}|df{{=}}yes}}
* {{tlx|Start date and age|{{var|YYYY}}|{{var|MM}}|{{var|DD}}|df{{=}}yes|p{{=}}yes|br{{=}}yes}}

== Parameters ==
{| class="wikitable"
! Parameter
! Status
! Description
|-
| {{para|1}}
| required
| A four-digit number indicating the year.
|-
|  {{para|2}}
| optional
| A number between 1 and 12 indicating the month (leading zeros in the number are ignored).
|-
|  {{para|3}}
| optional
| A number between 1 and 31 indicating the day of the month (leading zeros in the number are ignored).
|-
|  {{para|df}}
| optional
| When set to {{para|df|yes}} or {{para|df|y}} displays the day before the month (e.g. "7 November 2004" instead of the default "November 7, 2004").
|-
|  {{para|p}}<br/> {{para|paren}}
| optional
| When set to {{para|p|yes}} or {{para|p|y}} the age will be displayed within parentheses. When this parameter is not included, the date and age are separated by a semicolon and a breaking space.
|-
| {{para|br}}
| optional
| When set to {{para|br|yes}} or {{para|br|y}} a line break will be inserted between the date and the age. When this parameter is not included, a breaking space will be inserted between the date and the age. This does not change the separating characters between the date and age which are either a semicolon (default setting) or parentheses (if {{para|p|yes}}).
|}

== Examples ==
=== Default separator: semicolon ===
{| class="wikitable" style="width:100%;"
! style="width:60%;" | Syntax
! style="width:40%;" | Result
|-
|colspan="2" style="background-color:#DDD" | '''Full date (year, month, day)'''
|-
| {{tlx|Start date and age|2010|01|02}}
| {{Start date and age|2010|01|02}}
|-
| {{tlx|Start date and age|2010|1|2|df{{=}}yes}}
| {{Start date and age|2010|1|2|df=yes}}
|-
| {{tlx|Start date and age|2008|01|9|df{{=}}y}}
| {{Start date and age|2008|01|9|df=y}}
|-
| 100 days ago:<br />{{tlx|Start date and age|{{#time:Y|now-100 days}}|{{#time:n|now-100 days}}|{{#time:j|now-100 days}}}}
| {{Start date and age|{{#time:Y|now-100 days}}|{{#time:n|now-100 days}}|{{#time:j|now-100 days}}}}
|-
| Yesterday:<br />{{tlx|Start date and age|{{#time:Y|now-1 days}}|{{#time:n|now-1 days}}|{{#time:j|now-1 days}}}}
| {{Start date and age|{{#time:Y|now-1 days}}|{{#time:n|now-1 days}}|{{#time:j|now-1 days}}}}
|-
| Today:<br />{{tlx|Start date and age|{{#time:Y|now}}|{{#time:n|now}}|{{#time:j|now}}}}
| {{Start date and age|{{#time:Y|now}}|{{#time:n|now}}|{{#time:j|now}}}}
|-
|colspan="2" style="background-color:#DDD" | '''Year and month'''
|-
| {{tlx|Start date and age|2001|9}}
| {{Start date and age|2001|9}}
|-
| {{tlx|Start date and age|2002|09}}
| {{Start date and age|2002|09}}
|-
|colspan="2" style="background-color:#DDD" | '''Year only'''
|-
| {{tlx|Start date and age|2005}}
| {{Start date and age|2005}}
|}

=== Optional separator: parentheses ===
{| class="wikitable" style="width:100%;"
! style="width:60%;" | Syntax
! style="width:40%;" | Result
|-
|colspan="2" style="background-color:#DDD" | '''Full date (year, month, day)'''
|-
| {{tlx|Start date and age|2003|02|15|p{{=}}yes}}
| {{Start date and age|2003|02|15|p=yes}}
|-
| {{tlx|Start date and age|2003|02|15|df{{=}}y|p{{=}}y}}
| {{Start date and age|2003|02|15|df=y|p=yes}}
|-
|colspan="2" style="background-color:#DDD" | '''Year and month'''
|-
| {{tlx|Start date and age|2003|02|p{{=}}y}}
| {{Start date and age|2003|02|p=y}}
|-
|colspan="2" style="background-color:#DDD" | '''Year only'''
|-
| {{tlx|Start date and age|2003|paren{{=}}yes}}
| {{Start date and age|2003|paren=yes}}
|}

=== Line break with semicolon ===
{| class="wikitable" style="width:100%;"
! style="width:60%;" | Syntax
! style="width:40%;" | Result
|-
|colspan="2" style="background-color:#DDD" | '''Full date (year, month, day)'''
|-
| {{tlx|Start date and age|2003|02|15|br{{=}}yes}}
| {{Start date and age|2003|02|15|br=yes}}
|-
| {{tlx|Start date and age|2003|02|15|df{{=}}y|br{{=}}y}}
| {{Start date and age|2003|02|15|df=y|br=y}}
|-
|colspan="2" style="background-color:#DDD" | '''Year and month'''
|-
| {{tlx|Start date and age|2003|02|br{{=}}y}}
| {{Start date and age|2003|02|br=y}}
|-
|colspan="2" style="background-color:#DDD" | '''Year only'''
|-
| {{tlx|Start date and age|2003|br{{=}}yes}}
| {{Start date and age|2003|br=yes}}
|}

=== Line break with parentheses ===
{| class="wikitable" style="width:100%;"
! style="width:60%;" | Syntax
! style="width:40%;" | Result
|-
|colspan="2" style="background-color:#DDD" | '''Full date (year, month, day)'''
|-
| {{tlx|Start date and age|2003|02|15|p{{=}}yes|br{{=}}yes}}
| {{Start date and age|2003|02|15|p=yes|br=yes}}
|-
| {{tlx|Start date and age|2003|02|15|df{{=}}y|p{{=}}y|br{{=}}y}}
| {{Start date and age|2003|02|15|df=y|p=y|br=y}}
|-
|colspan="2" style="background-color:#DDD" | '''Year and month'''
|-
| {{tlx|Start date and age|2003|02|p{{=}}y|br{{=}}y}}
| {{Start date and age|2003|02|p=y|br=y}}
|-
|colspan="2" style="background-color:#DDD" | '''Year only'''
|-
| {{tlx|Start date and age|2003|paren{{=}}yes|br{{=}}yes}}
| {{Start date and age|2003|paren=yes|br=yes}}
|}

==TemplateData ==
{{collapse top|[[Wikipedia:TemplateData|TemplateData]] documentation used by [[Wikipedia:VisualEditor|VisualEditor]] and other tools}}
{{TemplateData header|noheader=1}}
<templatedata>
{
	"params": {
		"1": {
			"label": "Year",
			"description": "A four-digit number indicating the year",
			"example": "2017",
			"type": "number",
			"required": true
		},
		"2": {
			"label": "Month",
			"description": "A number between 1 and 12 indicating the month",
			"example": "12",
			"type": "number",
			"suggested": true
		},
		"3": {
			"label": "Day",
			"description": "A number between 1 and 31 indicating the day of the month",
			"example": "31",
			"type": "number",
			"suggested": true
		},
		"df": {
			"label": "Display date first",
			"description": "Set to 'yes' to show the day before the month name",
			"type": "line",
			"suggestedvalues": [
				"yes",
				"y"
			]
		},
		"paren": {
			"aliases": [
				"p"
			],
			"label": "Display with parentheses",
			"description": "Set to 'yes' to display the age within parentheses. When this parameter is not included, the date and age are separated by a semicolon and a breaking space.",
			"type": "line",
			"suggestedvalues": [
				"yes",
				"y"
			]
		},
		"br": {
			"label": "Line break between date and age",
			"description": "Set to 'yes' to add a line break between the date and the age. When this parameter is not included, a breaking space will be inserted between the date and the age. This does not change the separating characters between the date and age which are either a semicolon (default setting) or parentheses (if paren=yes).",
			"type": "line",
			"suggestedvalues": [
				"yes",
				"y"
			]
		}
	},
	"description": "The Start date and age template displays the date that an event or entity started or was created."
}
</templatedata>
{{collapse bottom}}

== Use in microformats ==
{{UF-date-part}}

=== Example ===
{{nowiki template demo|format=inline|output=nowiki+|code=<nowiki>{{Start date and age|2016|12|31}}</nowiki>}}

==Usage in articles==
This template is most often used in infoboxes in articles about buildings or organizations, identifying when they were started/founded/opened or dissolved/ended/closed.

It has also been used for naval ships to indicate their commissioned age; however, several Wikipedia editors have reverted such edits. Use of this template in ship articles is therefore not recommended.

== Tracking categories ==
* {{clc|Pages using start date an age with invalid values}}
* {{clc|Pages using start date and age with unknown parameters}}

== See also ==
* {{tl|Start date}}
* {{tl|End date and age}}
* {{tl|Time ago}} and {{tl|Years or months ago}}
* {{tl|Age}}

{{Birth, death and age templates|dates}}

<includeonly>{{Sandbox other|
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[[Category:Date-computing templates based on current time]]
}}</includeonly>