“Another Day of Sun” is the first song in the film, composed by Justin Hurwitz and written by Benj Pasek and Justin Paul, sung by the entire La La Land cast.
The song is a choreographed party in broad daylight on the usually irritating, jammed LA highway – an extremely, amazing theatrical depiction of magic in the mundane.
The cast starts in their cars, in gridlocked L.A. traffic – and break into a choreographed troupe format dance.

The song’s featured singers tell personal “origin stories” that loosely foreshadow the plot of the movie, setting up the main characters' motivations as struggling performers also trying to make it in L.A.
The lyrics, too, foreshadow the entire movie, talking about inspirations and motivations for struggling actors and artists – with all their shimmering hopes and dreams – and the entire desperate nature of these desires.