"Good Riddance (Time of Your Life)" is a song by the American punk rock band Green Day. Although written by lead singer Billie Joe Armstrong before the release of the band's third album Dookie (1994), the song was not released until Green Day's fifth album, Nimrod (1997), and was the second single released from that album. An alternative version (in a different key, with a faster tempo and sparer arrangement) did appear as a B-side to the 1995 German import single for "Brain Stew/Jaded".
Although it was not issued as a physical single at the time of its original release in the United States, "Good Riddance (Time of Your Life)" later went on to sell over 2.6 million copies as a digital download in the country. The song is also certified Gold in the United Kingdom for sales of 400,000.