I don't think this article has made that case at all. They are correct that there are negative health effects for people being on the western edge of time zones because their social clocks are earlier than their biological clocks. But this is because people synchronize their social clocks with people in their time zones. But if an entire timezone shifts by an hour, they will naturally adjust their social clocks. As a thought experiment, imagine shifting the time zone by 12 hours, so midnight was called noon and noon was called midnight. People would simply shift their social clocks by 12 hours to adjust.
An actual example of this is Spain, which since WWII has been on the central European time zone, even though it is in Western Europe. According to this article, people in Spain should have more health problems and shorter lifespans, because their social clock is so much earlier than their body clocks. However as everyone who has ever been to Spain knows, the social clock in Spain does not have the same relationship to the wall clock as it does in other countries. In fact, relative to say the US, the social clock in Spain seems to be shifted a good two hours, for example with dinner at 9pm or 10pm. That seems like a very late hour for dinner, but relative to the sun that's more like 8pm.
An actual example of this is Spain, which since WWII has been on the central European time zone, even though it is in Western Europe. According to this article, people in Spain should have more health problems and shorter lifespans, because their social clock is so much earlier than their body clocks. However as everyone who has ever been to Spain knows, the social clock in Spain does not have the same relationship to the wall clock as it does in other countries. In fact, relative to say the US, the social clock in Spain seems to be shifted a good two hours, for example with dinner at 9pm or 10pm. That seems like a very late hour for dinner, but relative to the sun that's more like 8pm.