The "you can't wear white after Labor Day," rule was created to separate the old money elitists from the new money group. "It [was] insiders trying to keep other people out," according to Valerie Steele, director of the Museum at the Fashion Institute of Technology, in an interview with Time, "and outsiders trying to climb in by proving they know the rules."

For those who had money and could leave the city during warmer months, white was considered vacation attire. "If you look at any photograph of any city in America in the 1930s, you'll see people in dark clothes," Charlie Scheips, author of American Fashion, has said. Meanwhile, white linen suits and Panama hats were considered the "look of leisure." 

Some etiquette authorities like Judith Martin, rebuff this class theory, however, saying, "There are always people who want to attribute everything in etiquette to snobbery. There were many little rules that people did dream up in order to annoy those from whom they wished to disassociate themselves. But I do not believe this is one of them."

The true reason could be much simpler: After Labor Day, the first Monday of September, became a federal holiday in 1894, it came to mark the end of summer. Vacationers packed away their breezy white dresses and linen button-downs in favor of darker-hued clothing, like navy suits and gray sweaters. "There used to be a much clearer sense of re-entry," explained Steele. "You're back in the city, back at school, back doing whatever you're doing in the fall—and so you have a new wardrobe."

Regardless of how this subjective rule really came about, no one in 2019 should feel the need to follow it.

Text: Chelsea Peng