diff --git a/src/Ddeboer/Imap/Message/Headers.php b/src/Ddeboer/Imap/Message/Headers.php
index <HASH>..<HASH> 100644
--- a/src/Ddeboer/Imap/Message/Headers.php
+++ b/src/Ddeboer/Imap/Message/Headers.php
@@ -29,7 +29,7 @@ class Headers
         }
 
         if (isset($this->array['date'])) {
-            $this->array['date'] = preg_replace('/(.*)\(.*\)/', '$1', $this->array['date']);
+            $this->array['date'] = preg_replace('/([^\(]*)\(.*\)/', '$1', $this->array['date']);
             $this->array['date'] = new \DateTime($this->array['date']);
         }
Fixed regex parsing the date header (allowing multiple brackets)