Long answer, it’s complicated as usual. Short answer: single member electorates.
Not surprisingly, the senate (our upper house at the federal level) is much more representative than the lower house, because they have very large, multi-member electorates.
If you live in a safe seat, your vote only counts for election funding (last I checked $2ish per 1st preference).
Or, ooor, the obvious answer of mandating the UTC in the backend.
Actually moving societies all to UTC is a really bad idea, as outlined by many others, dozens of times on Lemmy.
24 hour time though, that’d be nice. Everyone already knows how it works anyway!