Issue with Date field in Customer Portal

Summary:

Issue with Date field in Customer Portal

Content (required):

I have a CO.DOB field and it is configured for contact. From Agent Desktop through workspace we set this value as '27/04/1990'. When we are trying to query this from CP the value what we get is '26/04/1990'. Can anyone help me on this why this is happening or any timezone setting do I need to configure for this.

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):

select PrimaryContact.ParentContact.CustomFields.CO.DOB as DOB from Incident;