diff --git a/package.json b/package.json
index 8f080d8..e9d5aac 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "my-weekly-todo-list",
-  "version": "1.57.5",
+  "version": "1.57.6",
   "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 f2a2162..b007170 100644
--- a/src/components/WeeklyView.tsx
+++ b/src/components/WeeklyView.tsx
@@ -1597,7 +1597,18 @@ export default function WeeklyView() {
 
     // Extend events with editable flag from connections
     const calendarEvents = useMemo(() => {
-        return rawCalendarEvents.map((event) => {
+        // Deduplicate events that appear in multiple calendars
+        const seen = new Set<string>();
+        const deduped = rawCalendarEvents.filter((event) => {
+            const startVal = event.start?.dateTime || event.start?.date || "";
+            const endVal = event.end?.dateTime || event.end?.date || "";
+            const key = `${event.title}|${startVal}|${endVal}`;
+            if (seen.has(key)) return false;
+            seen.add(key);
+            return true;
+        });
+
+        return deduped.map((event) => {
             let isEditable = false;
             if (event.calendarId) {
                 for (const conn of connections) {