All, I wish to reopen the debate about the Australian Time Zone acronyms (EST versus AEST versus EDT versus AEDT). In the TZ database, the acronyms for the "Australian Eastern Standard Time"/ "Australian Eastern Daylight-Saving Time" time zone seasons is given as EST/EST. It is similar the for Central Time and Western Time (CST/CST and WST/WST respectively. The source file for australia discusses the case for these acronyms and also the case for alternative acronyms: (a) EST/EDT; and (b) AEST/AEDT. It looks like Mr.Olsen has settled on EST/EST because there is no legislative support for any official acronyms, and EST/EST is the most widely used. Within the source file, the Bureau of Meterology's web page on the subject ("http://www.bom.gov.au/climate/averages/tables/daysavtm.shtml") was mentioned in passing, however not any more was said of it. I believe that this web page should be given more weight than it has been given. This page shows that the Bureau of Meterology uses EST/EDT rather than EST/EST. Given a perusal of all the other web pages mentioned in the source file, I believe that this page represents the closest thing we can get to an "official" set of acronyms. I would like to make the case for using AEST/AEDT as the acronyms. Here are some points to consider, which have not been noted in the source file. (1) PRACTICAL. Even when the context of Australia is know, EST/EST makes it impractical to record times in the local clock with the acronym. For example in an event is recorded in the Australia/Sydney time zone as "2-Apr-2006 02:30 EST", and the context of "Australia" is given, what does this mean? It is ambiguous. It could be taken to mean either: (a) 1-Apr-2006 15:30 GMT; or (b) 1-Apr-2006 16:30 GMT. I suggest that it would be better to have a pair of acronyms that could be used to differentiate standard time from daylight saving time. I acknowledge that there has already been considerable discussion on the relative importance of having unambiguous acronyms, but that was in the wider context of all time-zones. The point that I am trying to make here is the advantage of unambiguous acronyms just in the case where the time zone is already known as Australia/Sydney. (2) CONSISTENCY WITH GOVERNMENT ORGANS. To be consistent with the treatment of other timezones, we should go with the closest thing to the official acronym, rather than the most popular one. I acknowledge that there is no legislatively official acronyms, but a mentioned earlier, the Bureau of Meterology's usage of EST/EDT is close. However the Bureaus' intended readership is Australian readers. It is not too hard to extrapolate from their full spelling of the seasons "Australian Eastern Standard Time" and "Australian Eastern Daylight Time", that had their audience been more international, that they would have written the obvious acronyms AEST and AEDT. I respectfully propose using AEST/AEDT, ACST/ACDT and AWST/AWDT as acronyms for the respective Australian time zones within the TZ database. Faithfully, Sean B. Durkin