The name of a particular hour has ZERO connection to that hour's use. You body doesn't know if an hour is called noon or 5:00. It only cares in relation to the position of the sun and the length of the daylight hours.
If people stay on DST and it turns out that starting the day an hour later is more beneficial, then life will simply gradually adjust.
You wake and sleep according to the artificial clock, but your body operates (chemically) on the amount of sun light that is available, and the discrepancy between the sun clock and the social clock, is where the health effects come in:
> For example, New York’s social clock closely matches the sun clock in winter during Standard Time: when the social clock says it is noon, it is very close to midday, the sun’s highest point in the sky. During DST, however, New York’s social clock shows noon when it is only 1100 h by the sun clock. People who have to get up at 0600 h by the sun clock in winter have to get up at 0500 h by the sun clock under DST, despite the social clock showing 0600 h. Essentially, they have to go to work in 1 time zone further to the east. This means that people in Chicago have to work during the office hours of New York, and people in Berlin have the office hours of St. Petersburg. Instead of seeing DST as working according to one time zone to the east, one can also think of it as people’s body clocks being pushed further west within their time zone (or social clock). Since the body clock follows the sun clock, these changes can affect our health.
> An understanding of time zones is essential for appreciating the effects of DST because switching to DST is nothing else but assigning the respective location to one time zone further east. This switch increases the discrepancy between the sun clock and the social clock by 1 h. This means that for Galicia [Spain] during summer, it is only 9:30 am by the sun clock when social clock claims noon, since they now have to live according to the hour-meridian that runs roughly through St. Petersburg [Russia].
If people stay on DST and it turns out that starting the day an hour later is more beneficial, then life will simply gradually adjust.