September 1st is the Day of Knowledge in Russia and several neighbouring countries, marking the first day of the school year with ceremonies, flowers for teachers and the symbolic first bell. Every autumn the date spawns a wave of back-to-school memes on TikTok, from summer-is-over laments to first-day-of-school skits. This twelve-second clip circulates as one of those seasonal trend sounds, though its exact original source is not documented. Its staying power comes from the calendar itself: the joke renews every September, so the sound resurfaces year after year.