Given comments about increased data file size and about storing rules in the data files, I'm holding off on incorporating the proposed 64-bit changes in the ftp version of the time zone package. I welcome additional comments on these matters; in particular, is adding a "short-output" option to zic a way of addressing the concern, and is it a good idea (given that it will slow the spread of new-format data file)? I'm also holding off on handling TZ strings such as "<UTC+10>-10", with security in mind (as mentioned by other folks on the time zone mailing list). On the one hand, a string such as "<UTC+10>10\nX-Arbitrary-Mail-Header: Arbitrary-Value" could be used to forge a mail header. On the other hand, there are far easier ways forge mail headers. Is there anything that could be done by a carefully selected TZ value that can't be done more easily in other ways? --ado