Honestly, we should just do it like the original model of zones worked: 1 time zone per zone of latitude, i.e. each time zone aligned with each 15-degree-apart meridian.
None of this "Oh we used to be part of [Input Empire Name Here] so let's keep our time zones the same as them." Damned colonial bullshit...
Edit: Longitude, not latitude. Lol. Was thinking it but wrote the opposite. Haha.