diff --git a/source/_includes/nav.html.twig b/source/_includes/nav.html.twig
index 95be4b8..4ee0084 100644
--- a/source/_includes/nav.html.twig
+++ b/source/_includes/nav.html.twig
@@ -15,7 +15,7 @@
         title: 'Sponsor us',
         href: '/sponsor-us',
         active: page.url == '/sponsor-us',
-        enabled: true,
+        enabled: now|date('U') < site['date'],
     }
 ] %}