diff --git a/themes/build/layouts/partials/header.html b/themes/build/layouts/partials/header.html
index bd44d90c7f9..4b68995bc60 100644
--- a/themes/build/layouts/partials/header.html
+++ b/themes/build/layouts/partials/header.html
@@ -1,3 +1,19 @@
+<div class="conference-banner">
+  <a href="{{ relref . " /news/posts/2025/register-for-prestashop-developer-conference-2025" }}">
+    PrestaShop Developer Conference
+  </a>
+  <div class="container">
+    <div class="conference-title">
+      PrestaShop Developer Conference
+    </div>
+    <div class="conference-location">
+      Hybrid format! Paris, France & Online - November 19, 2025
+    </div>
+    <div class="conference-slogan">
+      Let's talk code, commerce and open source.
+    </div>
+  </div>
+</div>
 <header class="site-header">
 
   <div class="container">