diff --git a/src/com/android/settings/notification/ZenModeAutomationSettings.java b/src/com/android/settings/notification/ZenModeAutomationSettings.java
index 6636b33fb05..dab0a0d01e2 100644
--- a/src/com/android/settings/notification/ZenModeAutomationSettings.java
+++ b/src/com/android/settings/notification/ZenModeAutomationSettings.java
@@ -48,10 +48,11 @@ import java.util.List;
 import java.util.TreeSet;
 
 public class ZenModeAutomationSettings extends ZenModeSettingsBase {
-    private static final SimpleDateFormat DAY_FORMAT = new SimpleDateFormat("EEE");
 
     static final Config CONFIG = getConditionProviderConfig();
 
+    // per-instance to ensure we're always using the current locale
+    private final SimpleDateFormat mDayFormat = new SimpleDateFormat("EEE");
     private final Calendar mCalendar = Calendar.getInstance();
 
     private ServiceListing mServiceListing;
@@ -218,7 +219,7 @@ public class ZenModeAutomationSettings extends ZenModeSettingsBase {
 
     private String dayString(int day) {
         mCalendar.set(Calendar.DAY_OF_WEEK, day);
-        return DAY_FORMAT.format(mCalendar.getTime());
+        return mDayFormat.format(mCalendar.getTime());
     }
 
     private static Config getConditionProviderConfig() {
diff --git a/src/com/android/settings/notification/ZenModeScheduleDaysSelection.java b/src/com/android/settings/notification/ZenModeScheduleDaysSelection.java
index 6d11ffb1ea1..3e88046e415 100644
--- a/src/com/android/settings/notification/ZenModeScheduleDaysSelection.java
+++ b/src/com/android/settings/notification/ZenModeScheduleDaysSelection.java
@@ -41,8 +41,9 @@ public class ZenModeScheduleDaysSelection extends ScrollView {
         Calendar.FRIDAY,
         Calendar.SATURDAY,
     };
-    private static final SimpleDateFormat DAY_FORMAT = new SimpleDateFormat("EEEE");
 
+    // per-instance to ensure we're always using the current locale
+    private final SimpleDateFormat mDayFormat = new SimpleDateFormat("EEEE");
     private final SparseBooleanArray mDays = new SparseBooleanArray();
     private final LinearLayout mLayout;
 
@@ -66,7 +67,7 @@ public class ZenModeScheduleDaysSelection extends ScrollView {
             final CheckBox checkBox = (CheckBox) inflater.inflate(R.layout.zen_schedule_rule_day,
                     this, false);
             c.set(Calendar.DAY_OF_WEEK, day);
-            checkBox.setText(DAY_FORMAT.format(c.getTime()));
+            checkBox.setText(mDayFormat.format(c.getTime()));
             checkBox.setChecked(mDays.get(day));
             checkBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
                 @Override
diff --git a/src/com/android/settings/notification/ZenModeScheduleRuleSettings.java b/src/com/android/settings/notification/ZenModeScheduleRuleSettings.java
index f7015d31ca3..fef31752619 100644
--- a/src/com/android/settings/notification/ZenModeScheduleRuleSettings.java
+++ b/src/com/android/settings/notification/ZenModeScheduleRuleSettings.java
@@ -50,10 +50,11 @@ public class ZenModeScheduleRuleSettings extends ZenModeRuleSettingsBase {
     private static final String KEY_START_TIME = "start_time";
     private static final String KEY_END_TIME = "end_time";
 
-    private static final SimpleDateFormat DAY_FORMAT = new SimpleDateFormat("EEE");
-
     public static final String ACTION = Settings.ACTION_ZEN_MODE_SCHEDULE_RULE_SETTINGS;
 
+    // per-instance to ensure we're always using the current locale
+    private final SimpleDateFormat mDayFormat = new SimpleDateFormat("EEE");
+
     private Preference mDays;
     private TimePickerPreference mStart;
     private TimePickerPreference mEnd;
@@ -147,7 +148,7 @@ public class ZenModeScheduleRuleSettings extends ZenModeRuleSettingsBase {
                         if (sb.length() > 0) {
                             sb.append(mContext.getString(R.string.summary_divider_text));
                         }
-                        sb.append(DAY_FORMAT.format(c.getTime()));
+                        sb.append(mDayFormat.format(c.getTime()));
                         break;
                     }
                 }