"No white after Labor Day" is a traditional fashion rule in the United States that suggests avoiding white clothing, particularly white shoes, after Labor Day, which marks the unofficial end of summer.

This guideline originated in the late 19th and early 20th centuries, as white was associated with summer leisurewear among the upper class, who would switch to darker, more practical clothing for the fall season.

Today, the rule is largely seen as outdated, with many fashion experts and designers encouraging people to wear white year-round.

Modern trends focus on individual style rather than adhering to traditional seasonal norms, making the rule more of a historical curiosity than a strict guideline.