diff --git a/views/register.ejs b/views/register.ejs
index 985b1b6..44b0625 100644
--- a/views/register.ejs
+++ b/views/register.ejs
@@ -84,6 +84,12 @@
 
 <input name="nachname" class="form-control" placeholder="Nachname" required>
 
+<input type="date"
+       name="geburtsdatum"
+       class="form-control"
+       placeholder="Geburtsdatum"
+       required>
+
 <input name="mobil" class="form-control" placeholder="Mobilnummer" required>
 
 <input type="email" name="email" class="form-control" placeholder="E-Mail" required>
@@ -202,7 +208,7 @@
 <input class="form-check-input"
        type="checkbox"
        name="agreeConsent"
-       required>
+       id="agreeConsent">
 
 <label class="form-check-label">
 Einverständnis gelesen
@@ -276,6 +282,44 @@ function nextStep(step){
 
     if(step === 3){
         buildSummary();
+        checkAgeAndConsent();
+    }
+}
+
+function checkAgeAndConsent(){
+
+    const data =
+    JSON.parse(localStorage.getItem('registerData'));
+
+    if(!data || !data.geburtsdatum) return;
+
+    const birth = new Date(data.geburtsdatum);
+    const today = new Date();
+
+    let age = today.getFullYear() - birth.getFullYear();
+
+    const m = today.getMonth() - birth.getMonth();
+    if (m < 0 || (m === 0 && today.getDate() < birth.getDate())) {
+        age--;
+    }
+
+    const consentBox =
+    document.getElementById('agreeConsent');
+
+    if(!consentBox) return;
+
+    // Unter 18 → aktiv & Pflicht
+    if(age < 18){
+
+        consentBox.disabled = false;
+        consentBox.required = true;
+
+    } else {
+
+        // Ab 18 → deaktiviert
+        consentBox.checked = false;
+        consentBox.disabled = true;
+        consentBox.required = false;
     }
 }
 
@@ -386,6 +430,7 @@ function buildSummary(){
 
     let html = `
     <b>Name:</b> ${data.vorname} ${data.nachname}<br>
+    <b>Geburtsdatum:</b> ${data.geburtsdatum}<br>
     <b>Email:</b> ${data.email}<br>
     <b>Mobil:</b> ${data.mobil}<br>
     <b>Adresse:</b>