Recently one of our techs changed the date format in the admin settings. Now we seem to be getting RSS feed validation errors.

This feed does not validate.

    line 7, column 21: dc:date must be an W3CDTF date: 03-01-2012 [help]

          <dc:date>03-01-2012</dc:date>
                             ^

    line 27, column 30: dc:date must be an W3CDTF date: 2011-12-29 22:59:32 (10 occurrences) [help]

          <dc:date>2011-12-29 22:59:32</dc:date>

Date settings in the admin panel are as follows:
Date format:%Y-%m-%d
Date / Time format: %Y-%m-%d-%H-%i

Any help on what I need to do to get this to feed again is appreciated.