From [1], which is much better and more on-point, if still short: "Opponents of the proposition argue [...] the sun wouldn’t rise until 8 a.m. during some winter months, forcing children to walk to school or buses in darkness" Maybe school shouldn't start so early then? Starting at 8:30-9 would reduce a lot of that, though not all of it. Also, as a Canadian and Vancouverite... so what? Darkness is a fact of life, get…
Well sure, but maybe instead of changing the schedule of all schools in the state (which would in turn affect the schedules of parents etc.) it would be easier to just not change the clock? Using the statement 'well maybe school shouldn't start so early then' as an argument in favour of making schools start earlier seems rather contradictory.
That said, even for K12 students, I’d say it’s a give and take. Waking up and going out in the dark each morning does sound bad for mood and potentially for circadian rhythms. But school gets out at 3PM, and on the shortest days of the year, the sun sets around 5PM. That leaves only 2 hours to potentially spend outdoors in the sun, at best; after-school activities can easily consume much or all of that time, not to mention homework. Or even if you spend all day indoors, the earlier the sun sets, the sooner your body starts producing more melatonin and making you feel tired; robust artificial lighting can help, but then it’s harder when you are ready to start winding down for the day. And then there’s seasonal affective disorder (Google it). In all these cases, going from 2 to 3 hours of sunlight after school would be a big help.