diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/PumpCombo/ComboPlugin.java b/app/src/main/java/info/nightscout/androidaps/plugins/PumpCombo/ComboPlugin.java
index 021be21033..006f38f362 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/PumpCombo/ComboPlugin.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/PumpCombo/ComboPlugin.java
@@ -130,7 +130,7 @@ public class ComboPlugin implements PluginBase, PumpInterface, ConstraintsInterf
     /** Cache of the last <=2 boluses on the pump. Used to detect changes in pump history,
      * requiring reading pump more history. This is read/set in {@link #checkHistory()} when changed
      * pump history was detected and was read, as well as in {@link #deliverBolus(DetailedBolusInfo)}
-     * after bolus delivery. */
+     * after bolus delivery. Newest record is the first one. */
     private volatile List<Bolus> recentBoluses = new ArrayList<>(0);
 
     public static ComboPlugin getPlugin() {
@@ -424,6 +424,12 @@ public class ComboPlugin implements PluginBase, PumpInterface, ConstraintsInterf
         pump.initialized = true;
         MainApp.bus().post(new EventInitializationChanged());
 
+        // show notification to check pump date if last bolus is older than 24 hours
+        if (!recentBoluses.isEmpty() && recentBoluses.get(0).timestamp < System.currentTimeMillis() - 24 * 60 * 60 * 1000) {
+            Notification notification = new Notification(Notification.COMBO_PUMP_ALARM, MainApp.gs(R.string.combo_check_date), Notification.URGENT);
+            MainApp.bus().post(new EventNewNotification(notification));
+        }
+
         // ComboFragment updates state fully only after the pump has initialized,
         // so force an update after initialization completed
         MainApp.bus().post(new EventComboPumpUpdateGUI());
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 1272304a5c..68ff187e53 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -792,4 +792,5 @@
     <string name="zerovalueinprofile">Ungültiges Profil: %s</string>
     <string name="hoursago">vor %.1f h</string>
     <string name="combo_high_temp_rejected_due_to_pump_history_changes">Es wurde keine hohe TBR gesetzt, da nach der Berechnung Boluseinträge in der Pumpenhistorik gefunden wurden.</string>
+    <string name="combo_check_date">Der letzte Bolus liegt mehr als 24 Stunden zurück. Prüfe bitte das Datum auf der Uhr.</string>
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 6353f55fbc..54306fa182 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -877,5 +877,6 @@
     <string name="combo_error_multiple_boluses_with_identical_timestamp">Multiple boluses with the same amount within the same minute were just imported. Only one record could be added to treatments. Please check the pump and manually add a bolus record using the Careportal tab. Make sure to create a bolus with a time no other bolus uses.</string>
     <string name="mute">Mute</string>
     <string name="about_link_urls">\n\nhttp://www.androidaps.org\nhttp://www.androidaps.de (de)\n\nfacebook:\nhttp://facebook.androidaps.org\nhttp://facebook.androidaps.de (de)</string>
+    <string name="combo_check_date">The last bolus is older than 24 hours. Please check the date on the pump is set correctly.</string>
 </resources>