The 'September' meme is an annual internet tradition centered around the iconic 1978 hit by Earth, Wind & Fire. The phenomenon stems from the song's opening line, 'Do you remember the 21st night of September?', which has turned that specific date into a global 'internet holiday.' Every year, the web is flooded with videos of people dancing to the infectious disco beat, most notably popularized by comedian Demi Adejuyigbe's elaborate yearly tribute videos. The meme represents pure joy and nostalgia, serving as a seasonal marker that brings social media users together to celebrate the transition into autumn with a universal, funky groove.