diff --git a/frontend/index.html b/frontend/index.html
index 6565e70..5233a62 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -4,7 +4,7 @@
   <meta charset="UTF-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no, viewport-fit=cover" />
   <!-- APP_VERSION: update here + version.js on every release -->
-  <title>Calendarr v6</title>
+  <title>Calendarr v7</title>
   <link rel="icon" type="image/svg+xml" href="/static/favicon.svg" />
   <link rel="manifest" href="/manifest.json" />
   <meta name="theme-color" content="#4285f4" />
@@ -80,7 +80,7 @@
       <button type="submit" class="btn btn-primary btn-full">Anmelden</button>
     </form>
   </div>
-  <button class="impressum-link" onclick="openImpressum()">©&nbsp;2026&nbsp;Scarriffleservices&nbsp;·&nbsp;v6</button>
+  <button class="impressum-link" onclick="openImpressum()">©&nbsp;2026&nbsp;Scarriffleservices&nbsp;·&nbsp;v7</button>
 </div>
 
 <!-- ─── MAIN APP ──────────────────────────────────────────── -->
@@ -159,7 +159,7 @@
     <aside class="sidebar" id="sidebar">
       <div class="sidebar-inner">
         <button class="btn btn-fab" id="btn-create-event">
-          <svg viewBox="0 0 24 24" fill="currentColor" width="24" height="24"><path d="M19 13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/></svg>
+          <svg viewBox="0 0 24 24" fill="currentColor" width="24" height="24"><path d="M19 13h-6v7h-2v-6H5v-2h6V5h2v7h6v2z"/></svg>
           <span data-i18n="btn_create">Erstellen</span>
         </button>
 
@@ -185,7 +185,7 @@
             <span data-i18n="my_calendars">Meine Kalender</span>
             <div class="add-cal-dropdown-wrap">
               <button class="icon-btn mini-btn" id="btn-add-cal" title="Kalender hinzufügen">
-                <svg viewBox="0 0 24 24" fill="currentColor"><path d="M19 13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/></svg>
+                <svg viewBox="0 0 24 24" fill="currentColor"><path d="M19 13h-6v7h-2v-6H5v-2h6V5h2v7h6v2z"/></svg>
               </button>
               <div class="add-cal-dropdown hidden" id="add-cal-dropdown">
                 <button data-action="local">Lokaler Kalender</button>
@@ -199,7 +199,7 @@
           <div id="cal-list-items"></div>
         </div>
       </div>
-      <button class="sidebar-copyright" onclick="openImpressum()">©&nbsp;2026&nbsp;Scarriffleservices&nbsp;·&nbsp;v6</button>
+      <button class="sidebar-copyright" onclick="openImpressum()">©&nbsp;2026&nbsp;Scarriffleservices&nbsp;·&nbsp;v7</button>
     </aside>
     <div id="sidebar-backdrop" class="sidebar-backdrop"></div>
 
@@ -235,7 +235,7 @@
           <input type="hidden" id="ev-start" />
           <div class="dt-display" id="ev-start-display" tabindex="0" role="button">
             <span class="dt-display-text">—</span>
-            <svg class="dt-display-icon" viewBox="0 0 24 24" fill="currentColor" width="16" height="16"><path d="M19 3h-1V1h-2v2H8V1H6v2H5c-1.1 0-2 .9-2 2v24a2 2 0 002 2h14a2 2 0 002-2V5c0-1.1-.9-2-2-2zm0 16H5V8h14v21zM7 10h5v6H7z"/></svg>
+            <svg class="dt-display-icon" viewBox="0 0 24 24" fill="currentColor" width="16" height="16"><path d="M19 3h-1V1h-2v2H8V1H6v2H5c-1.1 0-2 .9-2 2v24a2 2 0 002 2h14a2 2 0 002-2V5c0-1.1-.9-2-2-2zm0 16H5V8h14v21zM7 10h5v7H7z"/></svg>
           </div>
         </div>
         <div class="form-group half">
@@ -243,7 +243,7 @@
           <input type="hidden" id="ev-end" />
           <div class="dt-display" id="ev-end-display" tabindex="0" role="button">
             <span class="dt-display-text">—</span>
-            <svg class="dt-display-icon" viewBox="0 0 24 24" fill="currentColor" width="16" height="16"><path d="M19 3h-1V1h-2v2H8V1H6v2H5c-1.1 0-2 .9-2 2v24a2 2 0 002 2h14a2 2 0 002-2V5c0-1.1-.9-2-2-2zm0 16H5V8h14v21zM7 10h5v6H7z"/></svg>
+            <svg class="dt-display-icon" viewBox="0 0 24 24" fill="currentColor" width="16" height="16"><path d="M19 3h-1V1h-2v2H8V1H6v2H5c-1.1 0-2 .9-2 2v24a2 2 0 002 2h14a2 2 0 002-2V5c0-1.1-.9-2-2-2zm0 16H5V8h14v21zM7 10h5v7H7z"/></svg>
           </div>
         </div>
       </div>
@@ -253,7 +253,7 @@
           <input type="hidden" id="ev-start-date" />
           <div class="dt-display" id="ev-start-date-display" tabindex="0" role="button">
             <span class="dt-display-text">—</span>
-            <svg class="dt-display-icon" viewBox="0 0 24 24" fill="currentColor" width="16" height="16"><path d="M19 3h-1V1h-2v2H8V1H6v2H5c-1.1 0-2 .9-2 2v24a2 2 0 002 2h14a2 2 0 002-2V5c0-1.1-.9-2-2-2zm0 16H5V8h14v21zM7 10h5v6H7z"/></svg>
+            <svg class="dt-display-icon" viewBox="0 0 24 24" fill="currentColor" width="16" height="16"><path d="M19 3h-1V1h-2v2H8V1H6v2H5c-1.1 0-2 .9-2 2v24a2 2 0 002 2h14a2 2 0 002-2V5c0-1.1-.9-2-2-2zm0 16H5V8h14v21zM7 10h5v7H7z"/></svg>
           </div>
         </div>
         <div class="form-group half">
@@ -261,7 +261,7 @@
           <input type="hidden" id="ev-end-date" />
           <div class="dt-display" id="ev-end-date-display" tabindex="0" role="button">
             <span class="dt-display-text">—</span>
-            <svg class="dt-display-icon" viewBox="0 0 24 24" fill="currentColor" width="16" height="16"><path d="M19 3h-1V1h-2v2H8V1H6v2H5c-1.1 0-2 .9-2 2v24a2 2 0 002 2h14a2 2 0 002-2V5c0-1.1-.9-2-2-2zm0 16H5V8h14v21zM7 10h5v6H7z"/></svg>
+            <svg class="dt-display-icon" viewBox="0 0 24 24" fill="currentColor" width="16" height="16"><path d="M19 3h-1V1h-2v2H8V1H6v2H5c-1.1 0-2 .9-2 2v24a2 2 0 002 2h14a2 2 0 002-2V5c0-1.1-.9-2-2-2zm0 16H5V8h14v21zM7 10h5v7H7z"/></svg>
           </div>
         </div>
       </div>
@@ -311,7 +311,7 @@
           <input type="hidden" id="ev-rec-until" />
           <div class="dt-display" id="ev-rec-until-display" tabindex="0" role="button">
             <span class="dt-display-text">—</span>
-            <svg class="dt-display-icon" viewBox="0 0 24 24" fill="currentColor" width="16" height="16"><path d="M19 3h-1V1h-2v2H8V1H6v2H5c-1.1 0-2 .9-2 2v24a2 2 0 002 2h14a2 2 0 002-2V5c0-1.1-.9-2-2-2zm0 16H5V8h14v21zM7 10h5v6H7z"/></svg>
+            <svg class="dt-display-icon" viewBox="0 0 24 24" fill="currentColor" width="16" height="16"><path d="M19 3h-1V1h-2v2H8V1H6v2H5c-1.1 0-2 .9-2 2v24a2 2 0 002 2h14a2 2 0 002-2V5c0-1.1-.9-2-2-2zm0 16H5V8h14v21zM7 10h5v7H7z"/></svg>
           </div>
         </div>
       </div>
@@ -865,7 +865,7 @@
       <a href="mailto:scarriffleservices@gmail.com">scarriffleservices@gmail.com</a></p>
     </div>
     <div class="modal-footer" style="justify-content:space-between;align-items:center">
-      <span style="font-size:12px;color:var(--text-3)">Calendarr v6</span>
+      <span style="font-size:12px;color:var(--text-3)">Calendarr v7</span>
       <button class="btn btn-ghost" onclick="closeImpressum()">Schliessen</button>
     </div>
   </div>
diff --git a/frontend/js/calendar.js b/frontend/js/calendar.js
index 85ace73..267723a 100644
--- a/frontend/js/calendar.js
+++ b/frontend/js/calendar.js
@@ -106,9 +106,9 @@ function handleHAOAuthReturn() {
 }
 
 // ── Event cache ───────────────────────────────────────────
-const CACHE_BUF      = 56 * 86400000; // initial ±8 weeks
-const PREFETCH_EXT   = 56 * 86400000; // extend by 8 weeks when triggered
-const PREFETCH_EDGE  = 28 * 86400000; // trigger when within 4 weeks of cache edge
+const CACHE_BUF      = 300 * 86400000; // initial ±10 months around the view
+const PREFETCH_EXT   = 180 * 86400000; // extend by ~6 months when triggered
+const PREFETCH_EDGE  =  90 * 86400000; // trigger when within ~3 months of cache edge
 
 const eventCache = {
   start: null, end: null, events: [],
diff --git a/frontend/js/version.js b/frontend/js/version.js
index bc8e7e5..6e19206 100644
--- a/frontend/js/version.js
+++ b/frontend/js/version.js
@@ -1,2 +1,2 @@
 // Increment APP_VERSION with every code change
-export const APP_VERSION = 'v6';
+export const APP_VERSION = 'v7';
diff --git a/frontend/sw.js b/frontend/sw.js
index 3e9316e..63e8715 100644
--- a/frontend/sw.js
+++ b/frontend/sw.js
@@ -1,7 +1,7 @@
 // Calendarr Service Worker
 // Cache-first for static assets, network-first for /api/* (graceful offline)
 
-const CACHE_VERSION = 'calendarr-v6';
+const CACHE_VERSION = 'calendarr-v7';
 const STATIC_ASSETS = [
   '/',
   '/index.html',