TIL that singer Van Morrison did not release the song "Moondance" as a single until September 1977, seven and a half years after the album of the same year was released.

https://en.wikipedia.org/wiki/Moondance_(Van_Morrison_song)

https://www.reddit.com/r/todayilearned/comments/1662mmp/til_that_singer_van_morrison_did_not_release_the/