Blue Monday isn’t scientifically sound. Arnall’s formula looks the part: [W+ (D-d)]xTQ/MxNA. But upon closer inspection, the variables involved are subjective and plainly unscientific. W, for …
https://www.cnn.com/2021/01/18/health/blue-monday-2021-debunked-wellness-scli-gbr-intl/index.html

