diff --git a/views/article/_form.php b/views/article/_form.php
index 7f326a5..d77c904 100644
--- a/views/article/_form.php
+++ b/views/article/_form.php
@@ -98,7 +98,7 @@
     <?php echo $form->field($model, 'published_at')->widget(
         'trntv\yii\datetime\DateTimeWidget',
         [
-            'momentDatetimeFormat' => Yii::$app->formatter->getMomentDatetimeFormat() ?: 'yyyy-MM-dd\'T\'HH:mm:ssZZZZZ',
+            'momentDatetimeFormat' => \centigen\base\helpers\DateHelper::getMomentDatetimeFormat() ?: 'yyyy-MM-dd\'T\'HH:mm:ssZZZZZ',
         ]
     ) ?>