Every year, with the arrival of January, Blue Monday returns promptly, the supposed saddest day of the year which falls on the third Monday of the month. A story that is repeated as if it were scientific fact, when in reality it has no basis. There are no serious studies that demonstrate that a specific day can be universally sadder than another. Blue Monday is an artificial construction, born for commercial reasons and then became a media habit.
A marketing idea from 2005
The idea was born in 2005 as part of an advertising campaign by Sky Travel, a travel agency that wanted to encourage bookings in a traditionally less dynamic period of the year. To make the operation credible, Cliff Arnall was involved, presented as a psychologist from Cardiff University, who declared that he had developed a mathematical equation capable of identifying the saddest day of the year. According to this formula, factors such as the winter weather, the debts accumulated during the holidays, the decline in motivation, the return to the work routine and the temporal distance from Christmas came into play.
The problem is that this equation has never been a scientific tool. The units of measurement of the parameters have never been defined, there is no statistical validation, a study has never been published in an academic journal and there is no theoretical basis in psychology that allows complex emotions such as sadness to be reduced to a mathematical formula. Indeed, over time different versions of the same equation have circulated, a clear sign that it was not a serious model, but a communication expedient adaptable to the needs of the moment.
Distances from the university
To make the nature of the operation even clearer, the University of Cardiff itself intervened, officially distancing itself from the Blue Monday theory, clarifying that it was not academic research and that the university did not endorse that alleged discovery in any way. In other words, the reference to the university only served to give an aura of authority to a purely advertising initiative.
Arnall himself, years later, admitted that he had been paid to support an already built studio. He wasn’t trying to prove a point, he was legitimizing a marketing campaign. The final confirmation came when he replicated the same pattern by proclaiming the “happiest day of the year”, this time sponsored by an ice cream brand. The emotional tone changes, but the mechanism remains identical: an emotional recurrence is created and then a product is proposed as a response.
Although all this has been known for some time, the myth of Blue Monday continues to be revived every January. It works because it is simple, immediate, easy to transform into a title and share on social media. It offers a quick explanation for a malaise that is actually complex, individual and linked to personal, social and economic factors. It transforms an often difficult period of the year into a symbolic date, convenient for building narratives and promotional campaigns.
The risk, however, is that of trivializing serious issues such as mental health and psychological distress. Sadness is not an event that occurs on a specific day of the calendar and it does not affect everyone in the same way. Reducing it to an annual event means transforming a complex human experience into a curiosity for media consumption.
Blue Monday is therefore one of the most successful examples of how “kind” fake news can become common sense. It’s not a scientific discovery, it’s not psychology, it’s not statistics. It’s well done advertising, disguised as a mathematical formula. And the fact that it continues to be told as a truth shows how easy it is to make a story survive, when it is convenient and works from a communicative point of view.
