Whatever you decide, please don't introduce a work around that makes up-to-date systems wrong (even by a second). It wouldn't be too hard to get zic to output a pre-1998 compatible version of its input files, which could be posted along with the new files on every release. julian -----Original Message----- From: Olson, Arthur David (NIH/NCI) [E] [mailto:olsona@dc37a.nci.nih.gov] Sent: 28 April 2009 12:50 To: tz@lecserver.nci.nih.gov Subject: 24:00 versus 23:59:59--insights? There are a few places with rules such as "... lastFri 0:00 ..." that should be "... lastThu 24:00 ..." One possibility is to rewrite the rules that way; doing so buys error messages from pre-1998 versions of zic. Another possibility is to rewrite the rules as "... lastThu 23:59:59 ..." which works with pre-1998 versions of zic but is a second off. A third way is to use 24:00 and, where it is used, include a comment about either upgrading zic or using the 23:59:59 dodge. I'd appreciate any insights on how to go forward. --ado http://www.bbc.co.uk/ This e-mail (and any attachments) is confidential and may contain personal views which are not the views of the BBC unless specifically stated. If you have received it in error, please delete it from your system. Do not use, copy or disclose the information in any way nor act in reliance on it and notify the sender immediately. Please note that the BBC monitors e-mails sent or received. Further communication will signify your consent to this.