NEW YORK (CBSNewYork) — While Jets fans may disagree, one British psychologist theorizes that Monday, January 17, was the most depressing day of the year.

Psychologist Cliff Arnall has developed a complicated equation on happiness, and contends that the combination of dreary weather, debt from the holidays and broken New Year’s resolutions add up to make the third Monday of January the saddest day of 2011.

READ MORE: NYC Mayoral Race: Recent Poll Shows New Yorker's Biggest Concern Is Crime, More Than Half Of Those Surveyed In Favor Of Increasing NYPD Budget

The day has been deemed “Blue Monday,” and was a Twitter trending topic Monday morning.

READ MORE: Travelers On American Airlines May Be Asked Their Weight Before Boarding Plane Through New Pilot Program

By a similar equation, the same psychologist finds June 17th will be the happiest day of the year.

MORE NEWS: COVID Impact: Six Flags Great Adventure In N.J. Is Ready For An Exciting And Safe Summer Season

You tell us — do you agree?