Thanks for sharing your list with the tz mailing list. In return, I'll add to your data by noting that CST can also be "Central Summer Time" (Australian) +1030, and that EST can be "Eastern Summer Time" (Australian) +1100 (if you look closely, you'll find those in the tz database) That list is certainly interesting, I'm from Melbourne, Australia, and I can't even begin to imaging what LIGT is supposed to represent... If nothing else though, your list will certainly quieten those who believe that if a few changes are made to the list of abbreviations in the data base will make them all unique, so that people can take an abbreviation and from that determine the offset. The huge number of ambiguities in your list (same abbreviation, different offset) ends that forever I hope. kre