This tittle’s song was used in the famous movie “La La Land”. Now, I have a question. What is ‘Sun’ ? I mean, I can’t understand what ‘Sun’ means. Does ‘sun’ mean the sun which is a star or day (like every day and Sunday)?
from my understanding, Sun in this context means " Love ", i take my example from shakespares sonnet 148. the 12th line, try googling it
No marvel then, though I mistake my view, The sun itself sees not till heaven clears.
from the interpretation here reading from the preceeding line,
no marvel then though i mistake thy view
meaning (dont be surprised if i fall in love with the wrong person)
then he went on to say
the sun itself sees not till heaven clears
which means that love itself is true/sure when there is no doubt but certainty.
so the song " Another Day of Sun ".. means " Another Day of LOVE "... and to note.. i love that song...