diff --git a/package.json b/package.json
index cda204d..33bd394 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "my-weekly-todo-list",
-  "version": "1.80.1",
+  "version": "1.80.2",
   "description": "A web-based weekly task management application that organizes to-dos and calendar events in a single, intuitive weekly view",
   "main": "index.js",
   "scripts": {
diff --git a/src/components/WeeklyView.tsx b/src/components/WeeklyView.tsx
index a2664b2..1cab1f0 100644
--- a/src/components/WeeklyView.tsx
+++ b/src/components/WeeklyView.tsx
@@ -780,6 +780,7 @@ export default function WeeklyView() {
 
     // Mobile detection
     const [isMobile, setIsMobile] = useState(false);
+    const [isPortrait, setIsPortrait] = useState(false);
 
     const [showMobileFabSheet, setShowMobileFabSheet] = useState(false);
     const [showMobileFabMenu, setShowMobileFabMenu] = useState(false);
@@ -1207,9 +1208,12 @@ export default function WeeklyView() {
         }
     }, []);
 
-    // Mobile detection — track viewport width
+    // Mobile detection — track viewport width and orientation
     useEffect(() => {
-        const check = () => setIsMobile(window.innerWidth <= 768);
+        const check = () => {
+            setIsMobile(window.innerWidth <= 768);
+            setIsPortrait(window.innerHeight > window.innerWidth);
+        };
         check();
         window.addEventListener("resize", check);
         return () => window.removeEventListener("resize", check);
@@ -5599,7 +5603,18 @@ export default function WeeklyView() {
                         )}
                         {syncError && <AlertCircle size={14} className="text-red-500" />}
                         <span>
-                            {profile.headerDisplay === "none" ? "" :
+                            {isPortrait ? (() => {
+                                const today = new Date();
+                                const visibleDays = getVisibleDays();
+                                const isTodayInWeek = visibleDays.some(d =>
+                                    d.getDate() === today.getDate() &&
+                                    d.getMonth() === today.getMonth() &&
+                                    d.getFullYear() === today.getFullYear()
+                                );
+                                const refDate = isTodayInWeek ? today : getCWReferenceDate(visibleDays);
+                                return refDate.toLocaleDateString(profile.language || "de-DE", { weekday: "short", day: "2-digit", month: "long", year: "numeric" });
+                            })() :
+                            profile.headerDisplay === "none" ? "" :
                             profile.headerDisplay === "date" ? (() => {
                                 const today = new Date();
                                 const isTodayInWeek = getVisibleDays().some(d =>