A security analyst created an ISAM for Mobile policy to perform context based authorization checks based on custom attributes and attached it to a protected resource.

The security analyst discovered that access to the protected resource is always getting denied.
To troubleshoot you check:

The WebSEAL configuration file contains a post-data entry in the [azn-decision-info] stanza.
The datatype entry is specified in the [user-attribute-definitions] stanza for this azn-decision-info attribute is of type date.
WebSEAL trace shows that the <post-data-name> value found for the post-data entry is 'May 20.
2013'.

Which change in data format will resolve this issue?