Now I know that technically they (whomever they may be) say the 3rd Monday of January is the most depressing; but one, we have an event that day and two, I always view the first week after the holidays as the most depressing. You almost feel 'deflated' or something. Regardless, Vintage Ads is acknowledging it this Monday.
Blue, ads that are predominantly blue in color, mention the word blue, etc
Depressing looking ads, like that one with the little girl who looks so sad to be getting Kix cereal, or any ad that is just sad/depressing.