Given Shanks's data, I'd guess that the Sun customer's ``one week too early'' was just a approximation, and the true error is one month too early. This is consistent with the rest of Canada. Here is a proposed patch.

The suggested has been incorporated into tzdata95i.tar.gz, available by anonymous ftp from the ~ftp/pub directory on elsie.nci.nih.gov (165.112.73.1). --ado