The post–Labor Day moratorium on white clothing and accessories has long ranked among etiquette hard-liners' most sacred rules. As punishment for breaking it in the 1994 movie Serial Mom, for instance, Patty Hearst's character was murdered by a punctilious psychopath. But ask your average etiquette expert how that rule came to be, and chances are that even she couldn't explain it.
Link:
Why shouldn’t we wear white after Labor Day?
