"Blue Monday"/ Marketing myth or real impact of winter on our mood?

2026-01-19 12:33:00, Kuriozitete CNA

Monday, January 19, is often known as “Blue Monday” and is considered the saddest day of the year. However, there is no scientific evidence to support this claim, and it remains more of a popular concept than a research-based fact.

The term “Blue Monday” was first coined in 2005 by psychologist Cliff Arnall for the British travel company Sky Travel, as a way to promote the winter holidays.

Arnall calculated this date, usually the third Monday in January, by combining several factors, such as winter weather, post-holiday debt, time since Christmas, motivation levels, and New Year’s resolutions. However, his formula has no scientific backing and is considered more of a marketing idea than a real measure of happiness. Despite this, the winter season and late fall often bring a broader "blue season," which can affect people's mood and energy, making the perception of "Blue Monday" more understandable in the context of seasonal changes in weather and social activity.

Winter blues and Seasonal Affective Disorder (SAD)

Many people experience winter blues, a seasonal and temporary decrease in mood and energy during the colder, darker season.

The most common symptoms include:

Low mood

Difficulty concentrating

Feeling tired

Loss of interest in activities they usually enjoy

The exact cause of SAD is not fully known, but experts link it to a lack of natural light, which affects body chemicals, such as serotonin and melatonin, which regulate mood and energy.

How to improve your condition during winter

According to Stephanie Davies, a happiness expert, overcoming winter blues doesn't require drastic changes, but small, intentional actions that support mental well-being.

Practical advice:

Going for a walk outside

Phone calls or conversations with friends

Regular exercise (even 20 minutes a day is enough)

Exposure to natural light

Maintaining a regular sleep schedule (7–9 hours)

Bright environment and, when possible, light therapy

Social interaction is also a powerful antidote to isolation and feelings of sadness during the colder months. A short conversation, a text message, or a phone call can significantly improve your mood.

conclusion

Although "Blue Monday" is more of a marketing concept, the impact of winter on people's moods is real. Simple actions like moving, exposure to natural light, and connecting with others help maintain energy and mental well-being during the darker months./CNA