update datetime part of configuration to match the code
@@ -63,8 +63,8 @@ suit your needs::
handlers:
object_based: false
datetime:
- format: Y-m-dTH:i:s
- default_timezone: UTC
+ format: <ISO8601 (Y-m-dTH:i:s)>
+ default_timezone: <timezone set in php.ini or via date_default_timezone_set>
array_collection: true
form_error: true
constraint_violation: true