:facepalm:... You really don't want to go there!!!
Uppp, too late, you're there...
In non-summer, Australia has 3 time zones...
WST (Western Standard Time) in Western Australia, which is GMT +8 hours.
CST (Central Standard Time) which is in South Australia and the Northern Territory and is GMT +9 and a half hours (yes, 9.5 hours!)
EST (Eastern Standard Time) for Queensland, New South Wales, Australian Capital Territory, Victoria and Tasmania. GMT +10 hours.
That was the easy part.... Now, in October each year SOME of these place do a crazy thing, like move the clocks forward one hour (why has never been explained properly to me... I know all the arguments 'for' and I'm not interested in hearing them again... Just saying...)
So, we end up with...
Western Australia... Stays the same, GMT +8.
South Australia moves, so becomes GMT +10 and a half hours (CDT). Northern Territory does not move.
Queensland does not move (stays at GMT +10), but the rest do and become EDT, at GMT +11....
So, during summer Australia has 5 time zones.... One of which (SA) is WEST of another (Queensland), but ahead of it by 30 minutes.... :loco:
HTH,
Chris........