Overview
- The label dates to a 2005 Sky Travel promotion built on a formula attributed to psychologist Cliff Arnall.
- Mental‑health experts and universities say there is no scientific basis for a single most-depressing day or for the touted equation.
- Reports emphasize genuine January stressors such as post‑holiday debt, shorter daylight, cold weather, and fading New Year’s resolutions.
- Analysts note the idea endures through media and social sharing, which can encourage people to dwell on negative feelings.
- Mexican outlets highlight support resources including Locatel (*0311 or 55 5658 1111), IMSS Orientación Médica (800 2222 668, option 4), and Línea de la Vida (800 911 2000).