Shame, shame, shame -- we know your name -- it's Kylie!

Just one day after Labor Day, Kylie Jenner broke the "don't wear white after Labor Day" fashion rule by rocking an all-white ensemble to leave the studio in Los Angeles. Have you no respect for the rules of elite society?!

For the afternoon out in the hot, hot sun, Ky donned a white turtle-neck sweater and a white kilt-style miniskirt. That's a lot of white for the day after Labor Day!

Supposedly, the no-white-after-Labor-Day rule came about in the late 1880s and was a way for society women to distinguish themselves from the poor and vulgar "nouveau riche" aka "new money." By the 1950s, ladies' fashion magazines made it a point to let middle class women know that white clothing was only to come out after Memorial Day and was to go back into the closet on Labor Day.

Clearly, the 18-year-old reality star doesn't care about these customs -- but we find it interesting that fancy ladies of yesteryear created them to weed out the vulgar ladies -- and Kylie's one of the first celebs to break it. Kylie Jenner do something vulgar?! Never! And by never -- we mean always.