Fixed a bug (#14628) where the DATE_ISO8601 variable was returning an incorrectly formatted date string.
diff --git a/system/helpers/date_helper.php b/system/helpers/date_helper.php
index d328a7b..553e8d7 100644
--- a/system/helpers/date_helper.php
+++ b/system/helpers/date_helper.php
@@ -114,7 +114,7 @@
$formats = array(
'DATE_ATOM' => '%Y-%m-%dT%H:%i:%s%Q',
'DATE_COOKIE' => '%l, %d-%M-%y %H:%i:%s UTC',
- 'DATE_ISO8601' => '%Y-%m-%dT%H:%i:%s%O',
+ 'DATE_ISO8601' => '%Y-%m-%dT%H:%i:%s%Q',
'DATE_RFC822' => '%D, %d %M %y %H:%i:%s %O',
'DATE_RFC850' => '%l, %d-%M-%y %H:%m:%i UTC',
'DATE_RFC1036' => '%D, %d %M %y %H:%i:%s %O',