No, you can't change the name of built-in fields.

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Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
>I want to change the name of an existing contact field for example I want
>to
> change the field "display as" to "Date of birth" is this possible?