Most depressing day of the year

pop-sci, enjoy:

"Dr. Cliff Arnall's calculations show that misery peaks Monday.

Arnall, who specializes in seasonal disorders at the University of Cardiff, Wales, created a formula that takes into account numerous feelings to devise peoples' lowest point.

The model is: [W + (D-d)] x TQ
                          M x NA

The equation is broken down into seven variables: (W) weather, (D) debt, (d) monthly salary, (T) time since Christmas, (Q) time since failed quit attempt, (M) low motivational levels and (NA) the need to take action."