The following is an excerpt from the document YEAR2000 that was sent out
with MM/3000 updates. This document should be in the PUB group of your tools
account:
...
I. A.  DATE REPRESENTATIONS IN DATA BASES
=========================================

     No changes need to be made to either the data base structure or the
     data stored in the data base.

     Date fields in the YMD-DATE Customizer data type will continue to
     be represented as Image X6 fields.

     Years will continue to be stored in the data base as two-digit
     values; however the years 2000 to 2049 will be stored a little
     differently for YMD-DATE fields.

        Data Base
        Representation     The application interprets the year as:
        50-99                 1950-1999
        A0-A9                 2000-2009
        B0-B9                 2010-2019
        C0-C9                 2020-2029
        D0-D9                 2030-2039
        E0-E9                 2040-2049

     Only YMD-DATE fields will contain the new date representation.
     Other date formats, such as YMD-DATE-DISPLAY, remain unchanged.

     This new date format is referred through this document as the "A0"
     format.  (The previous date format is referred to as the "00"
     format.)

     If you had YMD-DATE data with the year 2000 and/or beyond in your
     data base before you installed the Year 2000 enhancement, it will
     be converted to the "A0" format the next time the record is
     updated.

...
I hope this clears up Jim's question.
Regards,
Ernest Hill
eXegeSys Inc.
144 South 500 East
Salt Lake City, UT 84102
Phone: (801) 799-0917
Fax:     (801) 538-0228
www.exegesys.com