diff --git a/CHANGELOG.md b/CHANGELOG.md
index 10be896..f34b4f3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.5.7] - 2026-04-03
+
+### Fixed
+- Fix recurring calendar events not expanding - RRULE parser now strips the `RRULE:` prefix used by ICS/CalDAV, which previously caused all recurrence rules to be silently ignored
+- Fix recurring multi-day events not appearing when their start date falls before the view window but the event spans into it
+- Fix all-day recurring event instances getting datetime end values instead of date-only format
+- Add YEARLY recurrence frequency support for birthday and anniversary events
+
 ## [0.5.6] - 2026-04-03
 
 ### Fixed
diff --git a/package.json b/package.json
index ede924e..5c23267 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "oikos",
-  "version": "0.5.5",
+  "version": "0.5.7",
   "description": "Selbstgehosteter Familienplaner — Kalender, Aufgaben, Einkauf, Essensplan, Budget und mehr. Privat, offen, ohne Abo.",
   "main": "server/index.js",
   "engines": {
diff --git a/server/routes/calendar.js b/server/routes/calendar.js
index 197d60b..ef03359 100644
--- a/server/routes/calendar.js
+++ b/server/routes/calendar.js
@@ -43,6 +43,9 @@ function expandRecurringEvents(events, from, to) {
     const startMs    = new Date(event.start_datetime).getTime();
     const endMs      = event.end_datetime ? new Date(event.end_datetime).getTime() : null;
     const durationMs = endMs !== null ? endMs - startMs : null;
+    // Duration in days for all-day events (for date-only end calculation)
+    const isAllDay     = !!event.all_day;
+    const durationDays = isAllDay && durationMs !== null ? Math.round(durationMs / 86400000) : 0;
 
     // Original-Zeit-Teil erhalten (z.B. 'T14:30:00' oder '' bei All-Day)
     const timeSuffix = event.start_datetime.slice(10);
@@ -54,13 +57,28 @@ function expandRecurringEvents(events, from, to) {
     while (currentDate <= to && iterations < MAX_ITER) {
       iterations++;
 
-      if (currentDate >= from) {
+      // For multi-day events, check if the instance end reaches into [from, to]
+      let instanceEnd = currentDate;
+      if (isAllDay && durationDays > 0) {
+        const d = new Date(currentDate + 'T00:00:00');
+        d.setDate(d.getDate() + durationDays);
+        instanceEnd = `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')}`;
+      }
+
+      if (currentDate >= from || instanceEnd >= from) {
         const newStart = currentDate + timeSuffix;
         let newEnd = event.end_datetime;
         if (durationMs !== null) {
-          newEnd = new Date(new Date(newStart).getTime() + durationMs)
-            .toISOString()
-            .replace('.000Z', 'Z');
+          if (isAllDay) {
+            // Keep date-only format for all-day events
+            const d = new Date(currentDate + 'T00:00:00');
+            d.setDate(d.getDate() + durationDays);
+            newEnd = `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')}`;
+          } else {
+            newEnd = new Date(new Date(newStart).getTime() + durationMs)
+              .toISOString()
+              .replace('.000Z', 'Z');
+          }
         }
 
         result.push({
diff --git a/server/services/recurrence.js b/server/services/recurrence.js
index 038a914..a4ae8fb 100644
--- a/server/services/recurrence.js
+++ b/server/services/recurrence.js
@@ -17,8 +17,10 @@ const DAY_MAP = { MO: 1, TU: 2, WE: 3, TH: 4, FR: 5, SA: 6, SU: 0 };
  */
 function parseRRule(rule) {
   if (!rule) return null;
+  // Strip "RRULE:" prefix if present (ICS stores rules as "RRULE:FREQ=...")
+  const raw = rule.startsWith('RRULE:') ? rule.slice(6) : rule;
   const parts = {};
-  for (const segment of rule.split(';')) {
+  for (const segment of raw.split(';')) {
     const eq = segment.indexOf('=');
     if (eq === -1) continue;
     parts[segment.slice(0, eq).toUpperCase()] = segment.slice(eq + 1);
@@ -31,7 +33,7 @@ function parseRRule(rule) {
     .filter((d) => d !== undefined);
   const until    = parts.UNTIL ? parseUntilDate(parts.UNTIL) : null;
 
-  if (!['DAILY', 'WEEKLY', 'MONTHLY'].includes(freq)) return null;
+  if (!['DAILY', 'WEEKLY', 'MONTHLY', 'YEARLY'].includes(freq)) return null;
 
   return { freq, interval, byday, until };
 }
@@ -88,6 +90,15 @@ function nextOccurrence(baseDateStr, rrule) {
     // Monatsüberlauf korrigieren (z.B. 31. März + 1 Monat → 30. April)
     const lastDay = new Date(Date.UTC(next.getUTCFullYear(), next.getUTCMonth() + 1, 0)).getUTCDate();
     next.setUTCDate(Math.min(targetDay, lastDay));
+
+  } else if (freq === 'YEARLY') {
+    const targetMonth = base.getUTCMonth();
+    const targetDay   = base.getUTCDate();
+    next.setUTCFullYear(next.getUTCFullYear() + interval);
+    // Feb 29 in non-leap year → Feb 28
+    next.setUTCMonth(targetMonth);
+    const lastDay = new Date(Date.UTC(next.getUTCFullYear(), targetMonth + 1, 0)).getUTCDate();
+    next.setUTCDate(Math.min(targetDay, lastDay));
   }
 
   // UNTIL-Grenze prüfen