[#2494] Make sure the new timezone endpoint gets called in JavaScript

ckan/public/base/javascript/main.js

@@ -30,6 +30,20 @@ this.ckan = this.ckan || {};
     ckan.SITE_ROOT   = getRootFromData('siteRoot');
     ckan.LOCALE_ROOT = getRootFromData('localeRoot');
 
+    /* Save UTC offset of user in browser to display dates correctly
+     * getTimezoneOffset returns the offset between the local time and UTC,
+     * but we want to store it the other way round.
+     * see http://mdn.io/getTimezoneOffset for details
+     */
+    now = new Date();
+    utc_timezone_offset = -(now.getTimezoneOffset());
+    $.ajax(
+        ckan.sandbox().client.url('/util/set_timezone_offset/' + utc_timezone_offset),
+        {
+            async:false
+        }
+    );
+
     // Load the localisations before instantiating the modules.
     ckan.sandbox().client.getLocaleData(locale).done(function (data) {
       ckan.i18n.load(data);