January 20, 2025, is being called “Blue Monday.” Not because it’s also National Cheese Lover’s Day, which may result in increased consumption of blue cheese. And not because it happens to be the day of the Presidential Inauguration this year, which may be a happy day for some but unhappy for others. No, it’s because back in 2005, a U.K. company called Sky Travel, began dubbing the third Monday of January each year as “Blue Monday.” This travel company claimed that this is the day each year when happiness levels go furthest South, meaning fall to the lowest levels of the year. So, the question is whether this claim was based on, you know, that thing called science.

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