diff --git a/backend/src/routes/search.js b/backend/src/routes/search.js
index 85186e3..351da5e 100644
--- a/backend/src/routes/search.js
+++ b/backend/src/routes/search.js
@@ -62,7 +62,11 @@ router.post('/sync-calendar', authenticate, async (req, res) => {
   if (!feeds.length) return res.json({ ok: true, synced: 0, message: 'Keine Kalender-Abos vorhanden' });
 
   // Alter des Caches prüfen
-  if (!force) {
+  // Alte Cache-Prüfung: Wenn noch historische Events drin (start_dt < 2000), force-sync
+  const hasOldData = safeGet(() =>
+    db.prepare("SELECT 1 FROM calendar_event_cache WHERE user_id=? AND start_dt < '20200101' LIMIT 1").get(uid)
+  );
+  if (!force && !hasOldData) {
     const lastSync = safeGet(() =>
       db.prepare("SELECT MAX(synced_at) as s FROM calendar_event_cache WHERE user_id=?").get(uid)?.s
     );
@@ -80,6 +84,14 @@ router.post('/sync-calendar', authenticate, async (req, res) => {
       if (!raw) { errors.push(`${feed.name}: kein gültiger iCal-Feed`); continue; }
       const events = parseIcal(raw);
       if (!events.length) { errors.push(`${feed.name}: 0 Events geparst`); continue; }
+
+      // Nur zukünftige Events speichern (ab gestern rückwärts 1 Tag für Tagesevents)
+      // start_dt Format: YYYYMMDD oder YYYYMMDDTHHmmssZ → string-vergleichbar
+      const yesterday = new Date();
+      yesterday.setDate(yesterday.getDate() - 1);
+      const minDt = yesterday.toISOString().replace(/-/g,'').slice(0,8); // '20260604'
+      const futureEvents = events.filter(ev => !ev.start || ev.start >= minDt);
+
       // prepare INSIDE try-catch – wirft wenn Tabelle nicht existiert
       const ins = db.prepare(`
         INSERT INTO calendar_event_cache
@@ -88,11 +100,11 @@ router.post('/sync-calendar', authenticate, async (req, res) => {
       `);
       db.transaction(() => {
         db.prepare('DELETE FROM calendar_event_cache WHERE feed_id=?').run(feed.id);
-        events.slice(0, 300).forEach(ev =>
+        futureEvents.slice(0, 500).forEach(ev =>
           ins.run(feed.id, uid, ev.summary||'', ev.description||'', ev.location||'', ev.start||'', ev.end||'')
         );
       })();
-      totalSynced += events.length;
+      totalSynced += futureEvents.length;
     } catch(e) {
       console.error(`[CalendarSync] Feed "${feed.name}" (${feed.url}): ${e.message}`);
       errors.push(`${feed.name}: ${e.message}`);