Presumably, there would be specific date that this change will happen. But the seasons don't change instantly from summer to winter on a specific dat, they gradually change over a few weeks, where the confusion I talk about will still occur.

Or in Hawaii

Or have the company just define and post business hours that work for them, like all retail companies do.

Or arizona

Also I know Colorado is mountain and it's always either -6 or -7 but on any given day I have to look up which it is. It's not a reflection of my intelligence.

If you are in Hawaii you are near enough the equator that the day length changes is negligable anyway so having a offset is pointless.