diff --git a/demos/datepicker/localization.html b/demos/datepicker/localization.html
index 8fe0256cb95..8e6f0f08c44 100644
--- a/demos/datepicker/localization.html
+++ b/demos/datepicker/localization.html
@@ -40,8 +40,8 @@
 	<script src="../../ui/i18n/jquery.ui.datepicker-is.js"></script>
 	<script src="../../ui/i18n/jquery.ui.datepicker-it.js"></script>
 	<script src="../../ui/i18n/jquery.ui.datepicker-ja.js"></script>
+	<script src="../../ui/i18n/jquery.ui.datepicker-kk.js"></script>
 	<script src="../../ui/i18n/jquery.ui.datepicker-ko.js"></script>
-	<script src="../../ui/i18n/jquery.ui.datepicker-kz.js"></script>
 	<script src="../../ui/i18n/jquery.ui.datepicker-lt.js"></script>
 	<script src="../../ui/i18n/jquery.ui.datepicker-lv.js"></script>
 	<script src="../../ui/i18n/jquery.ui.datepicker-ml.js"></script>
@@ -123,8 +123,8 @@
 		<option value="id">Indonesian (Bahasa Indonesia)</option>
 		<option value="it">Italian (Italiano)</option>
 		<option value="ja">Japanese (&#26085;&#26412;&#35486;)</option>
+		<option value="kk">Kazakhstan (Kazakh)</option>
 		<option value="ko">Korean (&#54620;&#44397;&#50612;)</option>
-		<option value="kz">Kazakhstan (Kazakh)</option>
 		<option value="lv">Latvian (Latvie&ouml;u Valoda)</option>
 		<option value="lt">Lithuanian (lietuviu kalba)</option>
 		<option value="ml">Malayalam</option>
diff --git a/demos/index.html b/demos/index.html
index 88292e07a63..2564cfebfa5 100644
--- a/demos/index.html
+++ b/demos/index.html
@@ -69,8 +69,8 @@
 	<script src="../ui/i18n/jquery.ui.datepicker-is.js"></script>
 	<script src="../ui/i18n/jquery.ui.datepicker-it.js"></script>
 	<script src="../ui/i18n/jquery.ui.datepicker-ja.js"></script>
+	<script src="../ui/i18n/jquery.ui.datepicker-kk.js"></script>
 	<script src="../ui/i18n/jquery.ui.datepicker-ko.js"></script>
-	<script src="../ui/i18n/jquery.ui.datepicker-kz.js"></script>
 	<script src="../ui/i18n/jquery.ui.datepicker-lt.js"></script>
 	<script src="../ui/i18n/jquery.ui.datepicker-lv.js"></script>
 	<script src="../ui/i18n/jquery.ui.datepicker-ml.js"></script>
diff --git a/ui/i18n/jquery.ui.datepicker-kz.js b/ui/i18n/jquery.ui.datepicker-kk.js
similarity index 92%
rename from ui/i18n/jquery.ui.datepicker-kz.js
rename to ui/i18n/jquery.ui.datepicker-kk.js
index f1f897b006a..79e3f248158 100644
--- a/ui/i18n/jquery.ui.datepicker-kz.js
+++ b/ui/i18n/jquery.ui.datepicker-kk.js
@@ -1,7 +1,7 @@
 /* Kazakh (UTF-8) initialisation for the jQuery UI date picker plugin. */
 /* Written by Dmitriy Karasyov (dmitriy.karasyov@gmail.com). */
 jQuery(function($){
-	$.datepicker.regional['kz'] = {
+	$.datepicker.regional['kk'] = {
 		closeText: 'Жабу',
 		prevText: '&#x3c;Алдыңғы',
 		nextText: 'Келесі&#x3e;',
@@ -19,5 +19,5 @@ jQuery(function($){
 		isRTL: false,
 		showMonthAfterYear: false,
 		yearSuffix: ''};
-	$.datepicker.setDefaults($.datepicker.regional['kz']);
+	$.datepicker.setDefaults($.datepicker.regional['kk']);
 });