Summary: if the sun rises later in winter then it will be dark when most people wake up, which confuses your body and could lead to sleep deprivation.
The real health solve is for workplaces to set an adaptive clock-in time, so everyone wakes up with the sun.
International companies already have a country-dependent clock-in time; this is not much of a stretch.
(Edit: Mentioning schools since the article explicitly talks about children...)
Unless you wake up after 8am (which most people do not, during the week), then you already will have to wake up before sunrise in Vancouver, B.C., even without year-round daylight time.