Can you believe it's been 15 years since we first fell in love with "Mean Girls"?

Well, it has, and while you don't get the day off, that doesn't mean that Oct. 3 isn't a holiday. The date is known to social media and movie fans around the world as "Mean Girls Day."

Here's the backstory: In the popular 2004 film that inspired the day, there's a scene where Aaron Samuels (played by Jonathan Bennett) turns to Cady Heron (Lindsay Lohan) in class and asks her what day it is.

"It's October 3," she answers.

Since then, October 3 has joined other dates made significant by films.

So how should you celebrate it? Glad you asked:

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