Last week the Parliamentary Library of Australia issued a research note on daylight saving time in Austrlia. <http://www.aph.gov.au/LIBRARY/Pubs/rn/2006-07/07rn13.pdf>. Of some note: "EST" is listed before "AEST", and similarly for "CST" and "WST", so this is some semiofficial sanction for the abbreviations the tz database uses. The note mentions Eucla time, giving Wikipedia as the reference! (So much for the Australian Parliament being authoritative on the subject of Australian time zones....) It has a strange copyright notice: Except to the extent of the uses permitted under the Copyright Act of 1968, no part of this publication may be reproduced or transmitted in any form or by any means including information storage and retrieval systems, without the prior written concent of the Department of Parliamentary Services, other than by senators and members of the Australian Parliemant in the course of their official duties. This makes it sound like I didn't have permission to download it off the net, but perhaps I should just ascribe this strange wording to hyperactive Australian copyright lawyers.