Every December, millions of American families would pile into their station wagons and head to Sears, JCPenney, or their local department store for an annual ritual as predictable as Black Friday sales: the family holiday portrait. What most people don't realize is that this seemingly mundane tradition fundamentally shaped modern portrait photography in ways that persist today, creating standards for lighting, posing, and customer experience that professional photographers still follow—often without realizing where these conventions originated.