# Yahoo! UI Library

### datatype 3.1.1

Yahoo! UI Library > datatype > datatype-date-locale.js (source view)
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    /**
     * @module datatype
    */

    /**
     * The Date.Locale class is a container for all localised date strings
     * used by Y.DataType.Date. It is used internally, but may be extended
     * to provide new date localisations.
     *
     * To create your own Locale, follow these steps:
     * <ol>
     *  <li>Find an existing locale that matches closely with your needs</li>
     *  <li>Use this as your base class.  Use Y.DataType.Date.Locale["en"] if nothing
     *   matches.</li>
     *  <li>Create your own class as an extension of the base class using
     *   Y.merge, and add your own localisations where needed.</li>
     * </ol>
     * See the Y.DataType.Date.Locale["en-US"] and Y.DataType.Date.Locale["en-GB"]
     * classes which extend Y.DataType.Date.Locale["en"].
     *
     * For example, to implement locales for French french and Canadian french,
     * we would do the following:
     * <ol>
     *  <li>For French french, we have no existing similar locale, so use
     *   Y.DataType.Date.Locale["en"] as the base, and extend it:
     *   <pre>
     *      Y.DataType.Date.Locale["fr"] = Y.merge(Y.DataType.Date.Locale, {
     *          a: ["dim", "lun", "mar", "mer", "jeu", "ven", "sam"],
     *          A: ["dimanche", "lundi", "mardi", "mercredi", "jeudi", "vendredi", "samedi"],
     *          b: ["jan", "f&eacute;v", "mar", "avr", "mai", "jun", "jui", "ao&ucirc;", "sep", "oct", "nov", "d&eacute;c"],
     *          B: ["janvier", "f&eacute;vrier", "mars", "avril", "mai", "juin", "juillet", "ao&ucirc;t", "septembre", "octobre", "novembre", "d&eacute;cembre"],
     *          c: "%a %d %b %Y %T %Z",
     *          p: ["", ""],
     *          P: ["", ""],
     *          x: "%d.%m.%Y",
     *          X: "%T"
     *      });
     *   </pre>
     *  </li>
     *  <li>For Canadian french, we start with French french and change the meaning of \%x:
     *   <pre>
     *      Y.DataType.Date.Locale["fr-CA"] = Y.merge(Y.DataType.Date.Locale["fr"], {
     *          x: "%Y-%m-%d"
     *      });
     *   </pre>
     *  </li>
     * </ol>
     *
     * With that, you can use your new locales:
     * <pre>
     *    var d = new Date("2008/04/22");
     *    Y.DataType.Date.format(d, { format: "%A, %d %B == %x", locale: "fr" });
     * </pre>
     * will return:
     * <pre>
     *    mardi, 22 avril == 22.04.2008
     * </pre>
     * And
     * <pre>
     *    Y.DataType.Date.format(d, {format: "%A, %d %B == %x", locale: "fr-CA" });
     * </pre>
     * Will return:
     * <pre>
     *   mardi, 22 avril == 2008-04-22
     * </pre>
     * @requires oop
     * @class DataType.Date.Locale
     * @static
     * @deprecated - use Y.config.lang to request one of many built-in languages instead.
     */
    var YDateEn = {
    	a: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
    	A: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
    	b: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
    	B: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
    	c: "%a %d %b %Y %T %Z",
    	p: ["AM", "PM"],
    	P: ["am", "pm"],
    	r: "%I:%M:%S %p",
    	x: "%d/%m/%y",
    	X: "%T"
    };

    Y.namespace("DataType.Date.Locale");

    Y.DataType.Date.Locale["en"] = YDateEn;

    Y.DataType.Date.Locale["en-US"] = Y.merge(YDateEn, {
    	c: "%a %d %b %Y %I:%M:%S %p %Z",
    	x: "%m/%d/%Y",
    	X: "%I:%M:%S %p"
    });

    Y.DataType.Date.Locale["en-GB"] = Y.merge(YDateEn, {
    	r: "%l:%M:%S %P %Z"
    });
    Y.DataType.Date.Locale["en-AU"] = Y.merge(YDateEn);

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