Many businesses already have differing winter/summer hours under the current regime. That is, they change their hours in winter and summer. And often those hour

Many businesses already have differing winter/summer hours under the current regime. That is, they change their hours in winter and summer. And often those hours don’t change in any consistent way. They do just fine despite the coordination problem you bring up. Business hours and human hours change all the time anyway. You have to check in instead of assume. The times that things happen are not and have never been static.