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What day is it? 'Mean Girls' knows: Celebrate Oct. 3 with Lindsay Lohan, Tina Fey in Friday flashback

What day is it?When Aaron Samuels asked that fateful question back in the 2004 movie "Mean Girls," Cady Heron — played by Lindsay Lohan — memorably responded, "It's October 3rd."It was the line that launched more memes and GIFs than Regina George got candygrams, and Oct. 3 —unofficially dubbed "Mean Girls Day" by the Internet — has become the day to celebrate. Even the Obama campaign got i

What day is it?

When Aaron Samuels asked that fateful question back in the 2004 movie "Mean Girls," Cady Heron — played by Lindsay Lohan — memorably responded, "It's October 3rd."

It was the line that launched more memes and GIFs than Regina George got candygrams, and Oct. 3 —unofficially dubbed "Mean Girls Day" by the Internet — has become the day to celebrate. Even the Obama campaign got in on the game, using the line to promote the first presidential debate in 2012.

The Obama campaign used this GIF to promote a presidential debate in 2012.Organizing for Action / Today

For the few people who haven't seen this film at some point over the last decade (it turned 10 this year), it's about a girl who is navigating the world of high school, from gossip to boys, parties and friends. The "October 3rd" exchange is just one of the many ways Cady tries to get closer to her crush, who sits in front of her in a class taught by Tina Fey — who also wrote the film. 

To celebrate this quotable film, take a tour through the archives with TODAY to see what Lohan, Fey and SNL creator Lorne Michaels had to say back when it was released.

And feel free to spend Mean Girls Day reciting your own favorite lines. You go, Glen Coco!