The song hits differently when you know why he wrote it. Green Day lead singer Billie Joe Armstrong wrote this about his father, who died of cancer on September 10th, 1982. At his father's funeral, Armstrong was overwhelmed with grief. He went home, locked himself in his room, and when his mother knocked on the door to check on him, he simply said, "Wake me up when September ends." This moment reportedly inspired the song's title and its heartfelt lyrics. https://video.twimg.com/amplify_video/1844497865290170368/vid/avc1/568x758/R2pd_omCvbxa_zK-.mp4?tag=16