Blue Monday is the name given to the so‑called “most depressing day of the year,” usually the third Monday in January, but it is widely considered a myth and marketing invention rather than a scientific fact. Even so, many people and mental health organisations now use Blue Monday as a reminder to talk about mood, winter blues and mental health support in a more open, helpful way.

What is Blue Monday?

  • The term Blue Monday refers to the idea that one specific Monday in January is the “most depressing day of the year.”
  • It is typically set as the third Monday of January, when holidays are over, daylight is short, and many people feel tired, broke or unmotivated.

Where did Blue Monday come from?

  • Blue Monday started in 2005 as part of a UK travel company’s PR campaign; a psychologist produced a “formula” combining weather, debt, time since Christmas and low motivation to “calculate” the date.
  • Scientists quickly criticised the formula as pseudoscience, but the catchy label stuck in media, advertising and online conversations.

Is Blue Monday real or just hype?

  • There is no solid scientific evidence that this Monday is truly more depressing than any other day, and major mental health charities call it a PR myth.
  • However, winter can genuinely worsen mood for some people due to seasonal affective disorder, reduced daylight, disrupted routines and post‑holiday financial stress, which makes the story feel believable.

Why do people still talk about it?

  • Blue Monday gives a simple, shareable story about why many people feel flat in early January, which makes it spread easily in news, advertising and social media.
  • Mental health organisations and workplaces often “flip” the idea and use the day to encourage checking in with others, running wellbeing activities and promoting year‑round mental health awareness.

Quick mental health notes

  • Feeling low on Blue Monday (or any day) does not mean there is something “wrong” with you; low mood in winter is very common, and support is available.
  • If mood is persistently low, affects sleep, appetite, work or relationships, or involves thoughts of self‑harm, contacting a doctor, mental health professional, or local crisis service is important; many charities also offer free helplines and online resources.

TL;DR: People ask “why Blue Monday?” because a 2005 travel‑industry PR stunt turned into a yearly media story, now repurposed by many as a prompt to talk more honestly about mental health in the dark weeks of January.

Information gathered from public forums or data available on the internet and portrayed here.