Making formatter with IntlDateFormatter::MEDIUM, to solve errors when trying to convert a bigger string into timestamp.

Author: marcoaacoliveira

lib/internal/Magento/Framework/Stdlib/DateTime/Timezone.php

@@ -177,7 +177,7 @@ public function date($date = null, $locale = null, $useTimezone = true, $include
                 $timeType = $includeTime ? \IntlDateFormatter::SHORT : \IntlDateFormatter::NONE;
                 $formatter = new \IntlDateFormatter(
                     $locale,
-                    \IntlDateFormatter::SHORT,
+                    \IntlDateFormatter::MEDIUM,
                     $timeType,
                     new \DateTimeZone($timezone)
                 );