diff --git a/backend/models/Member.js b/backend/models/Member.js
index 2c128ee..a415712 100644
--- a/backend/models/Member.js
+++ b/backend/models/Member.js
@@ -45,9 +45,9 @@ const Member = sequelize.define('Member', {
   },
   birthDate: {
     type: DataTypes.STRING, 
-    allowNull: false,
+    allowNull: true,
     set(value) {
-      const encryptedValue = encryptData(value);
+      const encryptedValue = encryptData(value || '');
       this.setDataValue('birthDate', encryptedValue);
     },
     get() {
diff --git a/frontend/src/components/QuickAddMemberDialog.vue b/frontend/src/components/QuickAddMemberDialog.vue
index 23635be..b8238ee 100644
--- a/frontend/src/components/QuickAddMemberDialog.vue
+++ b/frontend/src/components/QuickAddMemberDialog.vue
@@ -14,7 +14,8 @@
           <input 
             type="text" 
             id="firstName" 
-            v-model="localMember.firstName" 
+            :value="localMember.firstName"
+            @input="updateMember('firstName', $event.target.value)"
             required 
             class="form-input"
             placeholder="Vorname"
@@ -25,7 +26,8 @@
           <input 
             type="text" 
             id="lastName" 
-            v-model="localMember.lastName" 
+            :value="localMember.lastName"
+            @input="updateMember('lastName', $event.target.value)"
             class="form-input"
             placeholder="Nachname"
           />
@@ -33,17 +35,18 @@
       </div>
       <div class="form-row">
         <div class="form-group">
-          <label for="birthDate">Geburtsdatum:</label>
+          <label for="birthDate">Geburtsdatum (optional):</label>
           <input 
             type="date" 
             id="birthDate" 
-            v-model="localMember.birthDate" 
+            :value="localMember.birthDate"
+            @input="updateMember('birthDate', $event.target.value)"
             class="form-input" 
           />
         </div>
         <div class="form-group">
           <label for="gender">Geschlecht:</label>
-          <select id="gender" v-model="localMember.gender" class="form-select">
+          <select id="gender" :value="localMember.gender" @change="updateMember('gender', $event.target.value)" class="form-select">
             <option value="">Bitte wählen</option>
             <option value="male">Männlich</option>
             <option value="female">Weiblich</option>
@@ -101,15 +104,14 @@ export default {
         this.localMember = { ...newVal };
       },
       deep: true
-    },
-    localMember: {
-      handler(newVal) {
-        this.$emit('update:member', newVal);
-      },
-      deep: true
     }
   },
   methods: {
+    updateMember(field, value) {
+      this.localMember[field] = value;
+      this.$emit('update:member', { ...this.localMember });
+    },
+    
     handleClose() {
       this.$emit('update:modelValue', false);
       this.$emit('close');
diff --git a/frontend/src/views/DiaryView.vue b/frontend/src/views/DiaryView.vue
index 67bc258..24f58f5 100644
--- a/frontend/src/views/DiaryView.vue
+++ b/frontend/src/views/DiaryView.vue
@@ -1713,15 +1713,10 @@ export default {
         openQuickAddDialog() {
             this.showQuickAddDialog = true;
 
-            // Standard-Geburtsdatum: 01.01.(aktuelles Jahr - 10)
-            const currentYear = new Date().getFullYear();
-            const defaultBirthYear = currentYear - 10;
-            const defaultBirthDate = `${defaultBirthYear}-01-01`;
-
             this.newMember = {
                 firstName: '',
                 lastName: '',
-                birthDate: defaultBirthDate,
+                birthDate: '',
                 gender: ''
             };
         },
@@ -1736,39 +1731,46 @@ export default {
             };
         },
 
-        async createAndAddMember() {
-            if (!this.isNewMemberValid) return;
+        async createAndAddMember(memberData) {
+            console.log('🔍 createAndAddMember aufgerufen mit:', memberData);
+            
+            // Verwende die übergebenen Daten oder die lokalen Daten als Fallback
+            const data = memberData || this.newMember;
+            
+            console.log('📊 Verwendete Daten:', data);
+            
+            if (!data.firstName || data.firstName.trim() === '') {
+                console.log('❌ Validierung fehlgeschlagen: Vorname fehlt');
+                this.showInfo('Fehler', 'Vorname ist erforderlich', '', 'error');
+                return;
+            }
 
             try {
-                // Standard-Geburtsdatum falls keins eingegeben wurde
-                let birthDate = this.newMember.birthDate;
-                if (!birthDate) {
-                    const currentYear = new Date().getFullYear();
-                    const defaultBirthYear = currentYear - 10;
-                    birthDate = `${defaultBirthYear}-01-01`;
-                }
-
+                console.log('✅ Validierung erfolgreich, erstelle Mitglied...');
+                
                 // Erstelle neues Mitglied
-                const memberData = {
-                    firstName: this.newMember.firstName.trim(),
-                    lastName: this.newMember.lastName.trim(),
-                    birthDate: birthDate,
-                    gender: this.newMember.gender
+                const memberDataToSend = {
+                    firstName: data.firstName.trim(),
+                    lastName: data.lastName.trim(),
+                    birthDate: data.birthDate || '',
+                    gender: data.gender
                 };
+                
+                console.log('📤 Sende Daten an API:', memberDataToSend);
 
                 const response = await apiClient.post(`/clubmembers/set/${this.currentClub}`, {
                     id: null, // null für neues Mitglied
-                    firstname: memberData.firstName,
-                    lastname: memberData.lastName,
+                    firstname: memberDataToSend.firstName,
+                    lastname: memberDataToSend.lastName,
                     street: '',
                     city: '',
-                    birthdate: memberData.birthDate,
+                    birthdate: memberDataToSend.birthDate,
                     phone: '',
                     email: '',
                     active: true,
                     testMembership: false,
                     picsInInternetAllowed: false,
-                    gender: memberData.gender
+                    gender: memberDataToSend.gender
                 });
 
                 if (response.data.result === 'success') {
diff --git a/frontend/src/views/MembersView.vue b/frontend/src/views/MembersView.vue
index 4df6078..104b3bb 100644
--- a/frontend/src/views/MembersView.vue
+++ b/frontend/src/views/MembersView.vue
@@ -565,7 +565,9 @@ export default {
             pdfGenerator.save('Telefonliste.pdf');
         },
         getFormattedBirthdate(birthDate) {
+            if (!birthDate) return '–';
             const date = new Date(birthDate);
+            if (isNaN(date.getTime())) return '–';
             return `${String(date.getDate()).padStart(2, '0')}.${String(date.getMonth() + 1).padStart(2, '0')}.${date.getFullYear()}`;
         },
         labelGender(g) {