I don't mean to be cheeky or anything, but how can you comment on a condition you seem to not suffer?
Mine is temperature related.. and an hour here nor there will probably make little difference at this time o year, and i get mine in both the summer and the winter...
"The US National Library of Medicine notes that "some people experience a serious mood change when the seasons change. They may sleep too much, have little energy, and may also feel depressed. Though symptoms can be severe, they usually clear up."[4] The condition in the summer is often referred to as reverse seasonal affective disorder, and can also include heightened anxiety.[5]" (wikipedia)
You can't change the fact that the seasons are going to change, and where there's people like goaf who would appreciate the light in the evening, some want it in the morning.. so if you're basing an argument on that alone its not really conclusive, and a lot of people will probably continue to suffer or require medication whatever you do time wise.