Mondays are tough. Mondays in the middle of winter are even tougher. And today so many factors are working against us that a British psychologist is calling this day, January 22, the Unhappiest Day of the Year.

According to a CBS report, this proclamation is based on the psychologist Cliff Arnall's mathematical equation, which "takes into account six factors: bad weather, unpaid Christmas bills, post-Christmas fatigue, failed New Years resolutions, low motivation levels and the feeling of a need to take action. Taken together, they calculate to equal 'Blue Monday.'"

I'd like to add minimal daylight, day of the workweek and the U.S.-specific tax time to that equation.

Thanks to Anna (who claims today is one of the warmest, sunniest days of the season yet in Bend, Ore.) for flagging this story to me.