Good Riddance (Time of Your Life) – Wikipedia

Background, composition, and musical style. Billie Joe Armstrong wrote “Good Riddance (Time of Your Life)” in 1993 about his girlfriend named Amanda who moved to Ecuador, with him naming the song “Good Riddance” to show his anger towards her.He did not show the song to his bandmates until the Dookie recording sessions later the same year. During the sessions, however, the song was determined …

https://en.wikipedia.org/wiki/Good_Riddance_(Time_of_Your_Life)