Thanks for the heads-up. It reminds me of the situation in Indiana a while ago: business interests wanted to switch to daylight saving and Governor Mitch Daniels (who at the time had US Presidential aspirations) pushed it through. There was a lot of controversy, and although Daniels is a president now he's merely the president of Purdue ... I wonder if the South Australian premier knows that? Anyway, the SA government reports can be found here: Report on community consultation over South Australia's time zone, 5 February – 10 April 2015. <http://yoursay.sa.gov.au/documents/dsd170-sa-time-zone-report-on-community-c...> Whetton S, Kosturjak A, Kaye L, O'Neil M. Cost benefit analysis of changes to South Australia's time zone. SA Centre for Economic Studies, May 2015. <http://yoursay.sa.gov.au/documents/changes-to-timezones-cost-benefit-analysi...> Three amusing things about the cost benefit analysis. First, it says the main benefit of switching to EST (+1000) versus switching to true CST (+0900) is "reduced business cost". The report does not explain this benefit or break it down. Second, it says the main cost of switching to EST versus true CST is "increased energy usage", citing Kellogg & Wolfe 2007. These costs would fall on the community. Third, the report mentions "software costs to implement new time zone" as a disadvantage to switching to true CST (as opposed to EST, where it says the software cost of switching should be zero). Apparently nobody associated with the report had much expertise in time zone software....