title: jQuery UI datepicker: How to change the month names in the drop-down from short to long names?
body: <p>I need to <strong>change the month names from short names to long names</strong> in my jQuery UI datepicker.</p>
  
  <p>My properties are:</p>
  
  <pre><code>$.datepicker.regional['de'] = {
      prevText: '&amp;#x3c;zur&amp;uuml;ck',
      nextText: 'vor&amp;#x3e;',
      monthNames: ['Januar', 'Februar', 'M&amp;auml;rz', 'April', 'Mai', 'Juni',
              'Juli', 'August', 'September', 'Oktober', 'November', 'Dezember'],
      monthNamesShort: ['Jan', 'Feb', 'M&amp;auml;r', 'Apr', 'Mai', 'Jun',
              'Jul', 'Aug', 'Sep', 'Okt', 'Nov', 'Dez'],
      dayNames: ['Sonntag', 'Montag', 'Dienstag', 'Mittwoch', 'Donnerstag', 'Freitag', 'Samstag'],
      dayNamesShort: ['So', 'Mo', 'Di', 'Mi', 'Do', 'Fr', 'Sa'],
      dayNamesMin: ['So', 'Mo', 'Di', 'Mi', 'Do', 'Fr', 'Sa'],
      weekHeader: 'Wo',
      dateFormat: 'dd.mm.yy',
      firstDay: 1,
      changeMonth: true,
      changeYear: true,
      yearRange: "-0:+2",
      isRTL: false,
      showMonthAfterYear: false,
      minDate: 0
   };
  
  $.datepicker.setDefaults($.datepicker.regional['de']);
  var dates = $("#von, #bis").datepicker({
      showOn: "button",
      buttonImage: "calendar.png",
      buttonImageOnly: true,
      buttonText: 'Datum w\u00E4hlen',
      onSelect: function (selectedDate) {
          var option = this.id == "#von" ? "minDate" : "maxDate",
                  instance = $(this).data("datepicker"),
                  date = $.datepicker.parseDate(
                      instance.settings.dateFormat ||
                      $.datepicker._defaults.dateFormat,
                      selectedDate, instance.settings);
          dates.not(this).datepicker("option", option, date);
      }
  });
  </code></pre>
  
  <p>At the moment the calendar only shows short month names like "Apr" instead of "April" in the dropdown list.</p>
  
  <p>Maybe I am overwriting the default long names with some piece of code?</p>
  
  <p>Please help.</p>