Blue Monday? Feh. Ben Goldacre says that Blue Monday, the alleged "most depressing day of the year," is crap:
…we know that lots of things really are associated with depression, like social isolation, stressful life events, neighbourhood social disorder, poverty, child abuse, and the rest. Get those in the news, I dare you. Suicide is the third biggest cause of life years lost. Anything real you could do to study the causes, and possible preventive measures, or effective interventions, would be cracking. Making stupid stuff up about the most depressing day of the year, on the other hand, doesn’t help anyone, because bullshit presented as fact is simply disempowering.
The Dish 