Since "Country House" and "My Very First Love Song" were taken down at the release of I'm Ready (EP), the longest songs were not publicly available. This was true until 2085 was released, beating all the songs by over 20 seconds.
Adam confirmed in an interview that the song is inspired by the poem Aeneid by Virgil, which consists of twelve books.[1]
The song was released on Ryan's birthday, more precisely when he was turning 21. The theme of the song is consistent with this, since in New York, the age of 21 is the age at which the greatest degree of independence is reached, in legal terms, and the song expresses the desire for the future.