It is October 3rd, known as "Mean Girls Day." This unofficial holiday is celebrated by fans of the 2004 movie "Mean Girls" starring Lindsay Lohan. The date comes from an iconic scene in the film when the main character Cady Heron, played by Lohan, says, "It's October 3rd" in response to a question by her crush. Since then, October 3rd has become a cultural reference and a day for fans to celebrate the movie with memes, quotes, and social media posts.