diff --git a/src/Filament/Resources/PageResource.php b/src/Filament/Resources/PageResource.php
index 6682adb..0e23c97 100644
--- a/src/Filament/Resources/PageResource.php
+++ b/src/Filament/Resources/PageResource.php
@@ -120,6 +120,7 @@ public static function form(Form $form): Form
 
                     DateTimePicker::make('published_at')
                         ->label(__('published at'))
+                        ->required()
                         ->default(now()),
                 ]),
                 Tabs\Tab::make(__('Image'))->schema([
diff --git a/src/Filament/Resources/PostResource.php b/src/Filament/Resources/PostResource.php
index da990be..70af34e 100644
--- a/src/Filament/Resources/PostResource.php
+++ b/src/Filament/Resources/PostResource.php
@@ -117,6 +117,7 @@ public static function form(Form $form): Form
 
                     DateTimePicker::make('published_at')
                         ->label(__('published at'))
+                        ->required()
                         ->native(false)
                         ->default(now()),