It's political, but not necessarily in a bad way. e.g. a state decides it wants to be on the same timezone as a neighbour so that trade goes smoothly. or more

It's political, but not necessarily in a bad way. e.g. a state decides it wants to be on the same timezone as a neighbour so that trade goes smoothly. or more frequently: in most countries, it's up to individual states/provinces whether they follow daylight savings or not; so there's always a few each year that decide to start doing or stop doing daylight savings.