This converter translates a time in one location to the equivalent local time in another, covering Australia's own patchwork of time zones alongside international ones. Australia is trickier than most countries in this regard: Queensland and Western Australia don't observe daylight saving time at all, while New South Wales, Victoria, South Australia, Tasmania and the ACT shift their clocks forward each spring, so the gap between, say, Brisbane and Sydney actually changes twice a year rather than staying fixed.
The Northern Territory also skips daylight saving, and South Australia sits on a half-hour offset from the eastern states year-round on top of that. The calculator applies the correct daylight saving rules automatically for whatever date is selected, rather than assuming a fixed year-round gap between locations.