Go for a run, hit the ski hill, all before you start work. The sun runs your health (circadian rhythm). I'm in Vancouver and this is the dumbest change. We're going to pay for this for a decade in premature deaths, and we'll end up on standard time anyway.

I always get up with the light so I think 4am would be too unreasonable. Especially if most cafes remain closed for hours still. 5am is tolerable.

As for winter, an extra hour of dark doesn't feel like a huge deal. When I commuted in the winter it was often happening around 6am while still dark anyways.

I have a feeling people's morning habits will change a bit to compensate for the darker mornings though. So I think it'll work out in the end.

Where do you expect the premature deaths to come from? Rush hour traffic in the dark?