diff --git a/frontend/src/components/NotebookCard.tsx b/frontend/src/components/NotebookCard.tsx
index 818fdd7..329499b 100644
--- a/frontend/src/components/NotebookCard.tsx
+++ b/frontend/src/components/NotebookCard.tsx
@@ -13,6 +13,7 @@ function formatDate(iso: string): string {
       month: 'short',
       day: 'numeric',
       year: 'numeric',
+      timeZone: 'UTC',
     });
   } catch {
     return iso;
diff --git a/frontend/src/layouts/NotebookLayout.astro b/frontend/src/layouts/NotebookLayout.astro
index 69f8a77..3951e07 100644
--- a/frontend/src/layouts/NotebookLayout.astro
+++ b/frontend/src/layouts/NotebookLayout.astro
@@ -51,6 +51,14 @@ const canonicalUrl = canonicalPath
   </head>
   <body class="bg-slate-950 text-slate-200 min-h-screen antialiased">
     <slot />
+    <script>
+      // Clean up stale service workers — SpiceBook doesn't use one
+      if ('serviceWorker' in navigator) {
+        navigator.serviceWorker.getRegistrations().then((regs) => {
+          for (const reg of regs) reg.unregister();
+        });
+      }
+    </script>
   </body>
 </html>
 
