$ git diff
diff --git a/ext/date/php_date.c b/ext/date/php_date.c
index 12d9ea7..64b3637 100644
--- a/ext/date/php_date.c
+++ b/ext/date/php_date.c
@@ -877,6 +877,9 @@ PHP_MSHUTDOWN_FUNCTION(date)
 		timelib_error_container_dtor(DATEG(last_errors));
 	}

+	DATEG(timezone) = NULL;
+	DATEG(default_timezone) = NULL;
+
 	return SUCCESS;
 }
 /* }}} */