Modified the Post model so dates are properly cast to datetimes. Laravel 5.4 now casts date to startOfDay dates by default.

Author: leeovery

src/Post.php

@@ -22,10 +22,10 @@ class Post extends Model implements TaggableInterface
      *
      * @var array
      */
-    protected $dates = [
-        'created_at',
-        'updated_at',
-        'published_at',
+    protected $casts = [
+        'created_at'   => 'datetime',
+        'updated_at'   => 'datetime',
+        'published_at' => 'datetime',
     ];
 
     /**