Where I live, that would mean tomorrow I'd work over 14 hours.

Even if we adjust it so it's 1 hour of sunlight before work* and 3 hours after (for an 8-hour day on average), I'd work 12 hours tomorrow, but only 4 hours in December. No thanks!

*For health, sunlight is most important for waking up, so 1 hour of sunlight before work gives just 1 hour to wake up and get to work. Anything less is sacrificing health for evening sunlight.)

Edit: It would probably be good for SAD in the winter, though, encouraging people to be outside during the daylight hours instead of at work. I could get on board with reduced work hours in winter. ;)