I wonder if daylight savings time has any effect on vitamin D levels?
Saskatchewan has the highest MS rates in Canada, and a few weeks ago my better half was chewing the fat with one of his fellow MS bike tour riders about the reasons for it. The other fellow wondered if the fact that this is the only province to not go on daylight savings time had anything to do with it. I think there might be something to it. When we lived in Alberta, at roughly the same latitude, we spent a lot more time outside on summer evenings because there was that one extra hour of light. Here, you have to pack in a bike ride at 9:00 pm, which doesn't give you much time if you don't get home until 6:00.