diff --git a/docs/dev/element-queries/README.md b/docs/dev/element-queries/README.md
index 1333759..256db00 100644
--- a/docs/dev/element-queries/README.md
+++ b/docs/dev/element-queries/README.md
@@ -124,10 +124,9 @@ For example, if you want to load entries with a custom `eventDate` field set wit
 ```
 ```php{7}
 use craft\elements\Entry;
-use craft\helpers\Db;
 
-$start =  Db::prepareDateForDb(new \DateTime('first day of next month'));
-$end =  Db::prepareDateForDb(new \DateTime('last day of next month'));
+$start = new \DateTime('first day of next month')->format(\DateTime::ATOM);
+$end =  new \DateTime('last day of next month')->format(\DateTime::ATOM);
 $entries = Entry::find()
     ->section('events')
     ->eventDate(['and', ">= {$start}", "<= {$end}"])