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==Usage==
This purpose of the '''{{tl|Start date}}''' template is to return a the date (or date-time) that an event or entity started or was created. It also includes duplicate, machine-readable date (or date-time) in the ISO date format (which is hidden by CSS), for use inside other templates (or table rows) which emit [[microformat]]s. '''It should only be used once in each such template''' and '''should not be used outside such templates'''. The hidden date degrades gracefully when CSS is not available.

=== When not to use this template ===

Do not use this template for:

* dates that are uncertain e.g. "before 4 April 1933"; "around 18 November 1939".
* dates outside the range given under "[[#Limitation|Limitation]]", below.
* other, secondary dates
* outside [[microformat]]-emitting templates - if in doubt, see the parent template's documentation
* more than one date in any parent template

==Syntax==

*{{tlx|Start date|year|month|day}}
*{{tlx|Start date|year|month|day|HH|MM|SS|TimeZone}} (MM and SS are optional; TimeZone may be a numerical value, or "Z" for [[Coordinated Universal Time|UTC]]; see examples)

;Examples
*{{tlx|Start date|1993}} → "{{Start date|1993}}"
*{{tlx|Start date|1993|02}} → "{{Start date|1993|02}}"
*{{tlx|Start date|1993|02|24}} → "{{Start date|1993|02|24}}"
*{{tlx|Start date|1993|02|24|08|30}} → "{{Start date|1993|02|24|08|30}}"
*{{tlx|Start date|1993|02|24|08|||+01:00}} → "{{Start date|1993|02|24|08|||+01:00}}"
*{{tlx|Start date|1993|02|24|08|||-07:00}} → "{{Start date|1993|02|24|08|||-07:00}}"
*{{tlx|Start date|1993|02|24|08|30|23}} → "{{Start date|1993|02|24|08|30|23}}"
*{{tlx|Start date|1993|02|24|08|30|23|Z}} → "{{Start date|1993|02|24|08|30|23|Z}}"
*{{tlx|Start date|1993|02|24|08|30|23|+01:00}} → "{{Start date|1993|02|24|08|30|23|+01:00}}"
*{{tlx|Start date|1993|02|24|08|30|23|-07:00}} → "{{Start date|1993|02|24|08|30|23|-07:00}}"

An optional parameter, <tt>df</tt>, can be set to "y" or "yes" (or indeed any value) to display the day before the month. This is primarily used in articles using DMY format for dates.

;Examples:
*{{tlx|Start date|<nowiki>1993|02|24|df=y</nowiki>}} → "{{Start date|1993|02|24|df=y}}"
*{{tlx|Start date|<nowiki>1993|02|24|08|30|df=yes</nowiki>}} → "{{Start date|1993|02|24|08|30|df=yes}}"

'''Note:''' The template will appear broken when the parameters are left blank (as seen hereinbefore).

=== Parameters ===
{{TemplateDataHeader}}
<templatedata>{
"description": "Date that an event or entity started or was created",
"params": {
"1": {"label": "YYYY", "description": "start year", "type": "number"},
"2": {"label": "MM", "description": "start month", "inherits": "1"},
"3": {"label": "DD", "description": "start day of month", "inherits": "1"},
"4": {"label": "HH", "description": "start hours", "inherits": "1"},
"5": {"label": "MM", "description": "start minutes", "inherits": "1", "default": "0"},
"6": {"label": "SS", "description": "start seconds", "inherits": "5"},
"7": {"label": "TZ", "description": "time zone offset, “+02:00”, “-06:00” or “Z” for UTC", "inherits": "1", "type": "string/line"},
"df": {"label": "day first", "description": "boolean parameter to put the date before the month name", "default": "false", "type": "string/line"}
}}</templatedata>

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

==See also==
* {{tl|Start-date}} – an alternative to this template
* {{tl|Start date and age}}
* {{tl|Start date and years ago}}
* {{tl|End date}}
* {{tl|End-date}}
* [[Wikipedia:WikiProject Microformats|WikiProject Microformats]]
* [[Wikipedia:Microformats]]
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