On gutsy, with tzdata 2007f-3ubuntu1 I see the following:
$ TZ=America/Rio_de_Janeiro date Mon Oct 15 12:58:45 UTC 2007 $ TZ=America/Sao_Paulo date Mon Oct 15 09:58:47 BRT 2007
On gutsy, with tzdata 2007f-3ubuntu1 I see the following:
$ TZ=America/ Rio_de_ Janeiro date Sao_Paulo date
Mon Oct 15 12:58:45 UTC 2007
$ TZ=America/
Mon Oct 15 09:58:47 BRT 2007