You are right, but then all timezones and DST are obsolete.
Switch the whole world over to UTC.
That makes that the day switches in the middle of a business day in Australia (and east Asia and Western US) but for night shift workers that is already the case.
One in Sydney gets up at 21:00 and goes to bed at 13:00. But one gets used to it, just like we switched to the Euro in 2002.
Much simpler, no confusion.
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