diff --git a/hugo.toml b/hugo.toml
index d05d591..1f65822 100644
--- a/hugo.toml
+++ b/hugo.toml
@@ -56,6 +56,7 @@ enableGitInfo = true
   cfpOpens = "2026-05-25"
   cfpCloses = "2026-07-31"
   ticketsUrl = ""  # Set to Tito/Eventbrite URL when tickets go on sale
+  ticketsValidFrom = "2026-05-01"  # Date pricing tiers were announced; required by Google's Offer.validFrom check
 
   # Contact & social
   email = "contact@python.ie"
diff --git a/layouts/partials/structured-data.html b/layouts/partials/structured-data.html
index 7a1efd6..44be968 100644
--- a/layouts/partials/structured-data.html
+++ b/layouts/partials/structured-data.html
@@ -73,7 +73,8 @@
     "offerCount": {{ len .Site.Params.tickets }},
     "priceCurrency": "EUR",
     "url": "{{ if .Site.Params.ticketsUrl }}{{ .Site.Params.ticketsUrl }}{{ else }}{{ .Site.BaseURL }}{{ end }}",
-    "availability": "https://schema.org/PreOrder"
+    "availability": "https://schema.org/PreOrder",
+    "validFrom": "{{ .Site.Params.ticketsValidFrom }}"
   }
 }
 </script>