diff --git a/frontend/src/PagesAdmin/EventCreatorAdminPage/EventCreatorAdminPage.tsx b/frontend/src/PagesAdmin/EventCreatorAdminPage/EventCreatorAdminPage.tsx
index f95eb2c30..ff30ed73f 100644
--- a/frontend/src/PagesAdmin/EventCreatorAdminPage/EventCreatorAdminPage.tsx
+++ b/frontend/src/PagesAdmin/EventCreatorAdminPage/EventCreatorAdminPage.tsx
@@ -148,6 +148,14 @@ export function EventCreatorAdminPage() {
       setShowSpinner(false);
     }
   }, [id, t, form]);
+  const startDt = form.watch('start_dt');
+  const visibilityFromDt = form.watch('visibility_from_dt');
+
+  useEffect(() => {
+    if (startDt && visibilityFromDt) {
+      form.trigger('visibility_from_dt');
+    }
+  }, [startDt, visibilityFromDt, form]);
 
   // ================================== //
   //          Creation Steps            //
@@ -475,7 +483,13 @@ export function EventCreatorAdminPage() {
       title_en: 'Summary',
       customIcon: 'ic:outline-remove-red-eye',
       validate: (data) => {
-        return !!data.visibility_from_dt;
+              if (!data.visibility_from_dt) {
+          return false;
+        }
+        if (data.start_dt && new Date(data.visibility_from_dt) > new Date(data.start_dt)) {
+          return false;
+        }
+        return true;
       },
       template: (
         <FormField
diff --git a/frontend/src/PagesAdmin/EventCreatorAdminPage/EventCreatorSchema.ts b/frontend/src/PagesAdmin/EventCreatorAdminPage/EventCreatorSchema.ts
index 6a9ca71a6..872bc05dd 100644
--- a/frontend/src/PagesAdmin/EventCreatorAdminPage/EventCreatorSchema.ts
+++ b/frontend/src/PagesAdmin/EventCreatorAdminPage/EventCreatorSchema.ts
@@ -25,34 +25,45 @@ const event_custom_ticket = z.object({
   name_en: z.string().min(1),
   price: z.number().min(0),
 });
-
 export const eventSchema = z.object({
-  // text and description
-  title_nb: EVENT_TITLE,
-  title_en: EVENT_TITLE,
-  description_long_nb: EVENT_DESCRIPTION_LONG,
-  description_long_en: EVENT_DESCRIPTION_LONG,
-  description_short_nb: EVENT_DESCRIPTION_SHORT,
-  description_short_en: EVENT_DESCRIPTION_SHORT,
-  // Date and information
-  start_dt: EVENT_START_DT,
-  duration: EVENT_DURATION,
-  end_dt: EVENT_END_DT,
-  category: EVENT_CATEGORY,
-  host: EVENT_HOST,
-  location: EVENT_LOCATION,
-  capacity: EVENT_CAPACITY,
-  // Payment/registration
-  age_restriction: EVENT_AGE_RESTRICTION,
-  ticket_type: EVENT_TICKET_TYPE,
-  custom_tickets: z.array(event_custom_ticket).optional(),
-  registration_url: EVENT_REGISTRATION_URL,
-  billig_id: EVENT_BILLIG_ID,
-  // Graphics
-  image: OPTIONAL_IMAGE,
-  // Summary/Publication date
-  visibility_from_dt: EVENT_VISIBILITY_FROM_DT,
-  visibility_to_dt: EVENT_VISIBILITY_TO_DT,
-});
+    // text and description
+    title_nb: EVENT_TITLE,
+    title_en: EVENT_TITLE,
+    description_long_nb: EVENT_DESCRIPTION_LONG,
+    description_long_en: EVENT_DESCRIPTION_LONG,
+    description_short_nb: EVENT_DESCRIPTION_SHORT,
+    description_short_en: EVENT_DESCRIPTION_SHORT,
+    // Date and information
+    start_dt: EVENT_START_DT,
+    duration: EVENT_DURATION,
+    end_dt: EVENT_END_DT,
+    category: EVENT_CATEGORY,
+    host: EVENT_HOST,
+    location: EVENT_LOCATION,
+    capacity: EVENT_CAPACITY,
+    // Payment/registration
+    age_restriction: EVENT_AGE_RESTRICTION,
+    ticket_type: EVENT_TICKET_TYPE,
+    custom_tickets: z.array(event_custom_ticket).optional(),
+    registration_url: EVENT_REGISTRATION_URL,
+    billig_id: EVENT_BILLIG_ID,
+    // Graphics
+    image: OPTIONAL_IMAGE,
+    // Summary/Publication date
+    visibility_from_dt: EVENT_VISIBILITY_FROM_DT,
+    visibility_to_dt: EVENT_VISIBILITY_TO_DT,
+  })
+  .refine(
+    (data) => {
+      if (data.visibility_from_dt && data.start_dt) {
+        return new Date(data.visibility_from_dt) <= new Date(data.start_dt);
+      }
+      return true;
+    },
+    {
+      message: 'Publication date must be before event start date!',
+      path: ['visibility_from_dt'], // Show error on the publication date field
+    },
+  );
 
 export type EventFormType = z.infer<typeof eventSchema>;