diff --git a/src/client/app/router.ts b/src/client/app/router.ts
index 14c9120640a4..49bf9441c75a 100644
--- a/src/client/app/router.ts
+++ b/src/client/app/router.ts
@@ -109,6 +109,15 @@ export function createRouter(
         latestPendingPath = null
         route.path = pendingPath
         route.component = fallbackComponent ? markRaw(fallbackComponent) : null
+        // reset page data
+        route.data = {
+          relativePath: '',
+          title: '404',
+          description: 'Not Found',
+          headers: [],
+          frontmatter: {},
+          lastUpdated: 0
+        }
       }
     }
   }
diff --git a/src/client/theme-default/components/LastUpdated.vue b/src/client/theme-default/components/LastUpdated.vue
index ab888fbc222e..3191ab05e0c0 100644
--- a/src/client/theme-default/components/LastUpdated.vue
+++ b/src/client/theme-default/components/LastUpdated.vue
@@ -7,7 +7,7 @@ const { theme, page } = useData()
 const hasLastUpdated = computed(() => {
   const lu = theme.value.lastUpdated
 
-  return lu !== undefined && lu !== false
+  return lu !== undefined && lu !== false && page.value.lastUpdated !== 0
 })
 
 const prefix = computed(() => {