Sun goes up at 09:34 and down at 15:16, most of us are at work. And that doesn't include the mountains blocking the sun, some weeks it barely goes above them. S

Sun goes up at 09:34 and down at 15:16, most of us are at work. And that doesn't include the mountains blocking the sun, some weeks it barely goes above them. So there's light, but no direct sun light. And when it's -10C, only a few square centimeters of my skin is exposed to the elements, not really producing any vit D.