Blue Monday
- Tony Skehan
- Jan 19
- 3 min read
Updated: Jan 23

Ever heard of the worst day of the year?
No not that one, the one that is supposed to apply to everyone in the Northern Hemisphere.
The third Monday in January.
It was “discovered” in 2005 by a British travel company during a very quiet January. Coincidence? I don’t think so.
They released a press report claiming they’d identified the most depressing day of the year (later nicknamed Blue Monday), using a neat little formula involving weather, debt, broken New Year’s resolutions and general misery.
Sounds scientific. Looked convincing. Got loads of media coverage.
There was just one small issue:
It wasn’t really science.
It was marketing.
Scientists, psychologists, and even the university associated with the psychologist who helped with the “formula” criticised the idea as pseudoscience. This is a shame as I don’t think the science quoted was ever meant to suffer peer review. As Dr Arnall who produced it said in an interview with “The Telegraph” (Jan 2010,a UK based newspaper);“I was originally asked to come up with what I thought was the best day to book a summer holiday but when I started thinking about the motives for booking a holiday, reflecting on what thousands had told me during stress management or happiness workshops, there were these factors that pointed to the third Monday in January as being particularly depressing,” .
The aim was simple — remind everyone how miserable January feels… and then gently suggest booking a holiday might help.
And it worked. The idea stuck. A lot of people still talk about it every year.
The idea took off partly because the factors people associated with January — gloomy weather, post-holiday blues, debts, failed resolutions — felt real to many, even if the method was invented. Media outlets loved the catchy angle, and travel companies used it to promote holidays as a mood-boosting antidote.
People were (and still are) susceptible to the idea of Blue Monday for a few very human reasons — none of which require a dodgy equation.
1. It feels true
January genuinely isn’t most people’s favourite month. Cold, dark, skint, back at work, resolutions wobbling. When someone labels that feeling and gives it a date, your brain goes, “Yes. That tracks.”
2. We like simple explanations for messy feelings
Low mood is uncomfortable and vague. A named day with a cause feels oddly reassuring.
It’s not me — it’s the calendar.
That’s psychologically tidy, even if it’s nonsense.
3. Authority bias
Throw in a “psychologist”, a “formula” and a few Greek letters and people stop asking awkward questions. Our brains are very polite around anything that looks official.
4. Shared misery is comforting
If everyone is apparently having the worst day of the year together, your own low mood feels normal rather than worrying. Humans bond beautifully over collective grumbling.
5. Confirmation bias does the rest
If you’re already tired and fed up, you’ll notice every minor annoyance on that Monday and think, “See? Knew it.”
You won’t notice the millions of people who felt absolutely fine.
6. It gives permission
Blue Monday offers a socially acceptable excuse to feel flat, unmotivated or disengaged — without having to look too closely at what’s actually going on underneath.
A useful reminder that:
• Just because something sounds psychological, doesn’t mean it is
• Feelings don’t follow formulas
• And sometimes the loudest “truths” are just well-timed PR
In short:
Blue Monday didn’t work because it was accurate.
It worked because it was relatable, simple, and arrived at exactly the moment people were already fed up.
Our minds love a story. Even when the story is not entirely correct.
No matter what the problem day is, I can work with you to make your “worst day of the year” just like any other day. Which may or may not be ideal for you. Well, you know what I mean…






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