diff --git a/Normalizer/DateTimeNormalizer.php b/Normalizer/DateTimeNormalizer.php
index d37358ce2..c12e23470 100644
--- a/Normalizer/DateTimeNormalizer.php
+++ b/Normalizer/DateTimeNormalizer.php
@@ -94,7 +94,7 @@ public function denormalize($data, string $type, string $format = null, array $c
 
             $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 {