My Mum has had it really badly for the last six years. She can be absolutely fine in the summer, but as soon as October/November rolls around she's lost in depression. For four years running she was absent from work for six months because of it.. it's serious stuff! There are lots of things you can do to try and help it; like you can synthesise the sun by buying a special lamp thing although that didn't work for my Mum. Most of my friends have never heard of it and it's hardly ever reported in the media, which is a shame because there are probably a lot of depressed people out there who can't find the route of their problem.