diff --git a/Normalizer/DateTimeNormalizer.php b/Normalizer/DateTimeNormalizer.php
index 3217bc38b..fef57d120 100644
--- a/Normalizer/DateTimeNormalizer.php
+++ b/Normalizer/DateTimeNormalizer.php
@@ -101,7 +101,7 @@ public function denormalize($data, $type, $format = null, array $context = [])
 
             $dateTimeErrors = \DateTime::class === $type ? \DateTime::getLastErrors() : \DateTimeImmutable::getLastErrors();
 
-            throw new NotNormalizableValueException(sprintf('Parsing datetime string "%s" using format "%s" resulted in %d errors:.'."\n".'%s', $data, $dateTimeFormat, $dateTimeErrors['error_count'], implode("\n", $this->formatDateTimeErrors($dateTimeErrors['errors']))));
+            throw new NotNormalizableValueException(sprintf('Parsing datetime string "%s" using format "%s" resulted in %d errors: ', $data, $dateTimeFormat, $dateTimeErrors['error_count'])."\n".implode("\n", $this->formatDateTimeErrors($dateTimeErrors['errors'])));
         }
 
         try {