diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 7a982b8..02afc3a 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -4,6 +4,7 @@ ThemeKey 7.x-2.0beta2, 2011-xx-xx
 [#1307126] mkalkbrenner: Treat blogs/username path as the same as user created nodes when selected in the UI
 [        ] mkalkbrenner: fixed warning in ThemeKey UI if sub theme contains no screenshot and base theme is not actived for selection
 [        ] mkalkbrenner: prevent activation ThemeKey UI features if not at least one selectable theme has been chosen
+[#1357698] mkalkbrenner: system:month and system:day_of_week have to return english values
 
 
 ThemeKey 7.x-2.0beta1, 2011-10-07
diff --git a/modules/themekey.system.inc b/modules/themekey.system.inc
index 7019fd3..6271012 100644
--- a/modules/themekey.system.inc
+++ b/modules/themekey.system.inc
@@ -476,7 +476,7 @@ function themekey_dummy2date_time($dummy) {
  *   current date as string formatted like "2009-12-24"
  */
 function themekey_dummy2date($dummy) {
-  return format_date(time(), 'custom', 'Y-m-d', variable_get('date_default_timezone', 0));
+  return format_date(time(), 'custom', 'Y-m-d', variable_get('date_default_timezone', 0), 'en');
 }
 
 
@@ -492,10 +492,10 @@ function themekey_dummy2date($dummy) {
  *   string containing current value of ThemeKey property system:dummy
  *
  * @return
- *   current date as string formatted like "2009-12-24"
+ *   current month as string, three letters formatted like "Jan"
  */
 function themekey_dummy2month($dummy) {
-  return format_date(time(), 'custom', 'M', variable_get('date_default_timezone', 0));
+  return format_date(time(), 'custom', 'M', variable_get('date_default_timezone', 0), 'en');
 }
 
 
@@ -643,7 +643,7 @@ function themekey_dummy2session($dummy) {
  *   current day of the week as three letters from "Mon" through "Sun"
  */
 function themekey_dummy2day_of_week($dummy) {
-  return format_date(time(), 'custom', 'D', variable_get('date_default_timezone', 0));
+  return format_date(time(), 'custom', 'D', variable_get('date_default_timezone', 0), 'en');
 }
 
 
@@ -659,7 +659,7 @@ function themekey_dummy2day_of_week($dummy) {
 *   string containing current value of ThemeKey property system:dummy
 *
 * @return
-*   current day of the week as three letters from "Mon" through "Sun"
+*   current day of the month without leading zeros
 */
 function themekey_dummy2day_of_month($dummy) {
   return format_date(time(), 'custom', 'j', variable_get('date_default_timezone', 0));