Template:Birth date and age/doc

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Description
The ' and ' templates will return a person’s date of birth and optionally his/her age. They have the shortcuts ' and ', respectively.

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.

To display a birth date with calculated age
This form is only intended for living persons. 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 year, month, and day parameters can be used instead of the first, second, and third parameters for only. These parameter names are not available for the template.

is a redirect to

 * Examples :


 * returns "February 4, 1993"
 * returns "February 4, 1993"
 * returns "February 4, 1993"
 * returns "February 24, 1993"
 * returns "February 24, 1993"
 * returns "February 24, 1993"


 * returns February 4, 1993
 * returns February 4, 1993
 * returns February 4, 1993
 * returns February 24, 1993
 * returns February 24, 1993
 * returns February 24, 1993

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., yes or 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.

The parameter mf, while not actually used by the template, will indicate that month first format is intended. Using these parameters can assist 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.

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


 * Examples :


 * displays "February 24, 1993".


 * displays "February 24, 1993".


 * displays "February 24, 1993".


 * displays "February 24, 1993".

hCard microformat
The templates also returns the date, hidden by CSS, in the ISO 8601 format (but not necessarily to the ISO 8601 standard) needed by hCard microformats. for example:



For the “foundation”, “built”, and similar set-up dates of companies, buildings, etc., use (this will work for year-only, or month-year dates).

See the microformats project at Wikipedia for details.

Template data
 {       "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 },               "2": {                        "label": "Month of birth", "description": "The month (number) in which the person was born", "type": "number", "required": true },               "3": {                        "label": "Day of birth", "description": "The day (number) in which the person was born", "type": "number", "required": true },               "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 }       } } 