A load of crap....
No, actually, I think there are people who have true "seasonal affective disorders". The rest are faking it.
Let me rephrase. Each spring the federal government forces us to wake up, go to work, start our day, all one hour earlier and tell us they are giving us a extra hour of daylight. (And it is all reversed each Fall when they give us that hour back.) Psst, they steal it from the morning.
In a way it is like Social Security, except in that case there will be no sunshine to give us back.
In any-case, enjoy your extra hour tonight all, unless you are working midnight shift tonight.