"Wake Me Up When September Ends" is a song by the American rock band Green Day, released in 2005 as part of their album American Idiot. The song was written by the band's frontman, Billie Joe Armstrong, about the death of his father in September 1982. It is a rock ballad that has become widely recognized and praised for its lyrical content. The song has also been interpreted as a reflection on the victims of the September 11 attacks and has seen annual spikes in popularity during the final days of September, often accompanied by internet memes. The official music video depicts the impact of the Iraq War on soldiers and was designed as a mini-movie.
As for the end of September 2025, it ends on September 30. If you want to be woken up when September ends, that would be on October 1, 2025.