The song is from a comic opera called H.M.S. Pinafore(The Lass That Loved a Sailor) which contatins two acts. It first opened in London in 1878.
Captain.
Fair moon, to thee I sing,
Bright regent of the heavens,
Say, why is everything
Either at sixes or at sevens?
Say, why is everything
Either at sixes or at sevens?
I have lived hitherto
Free from breath of slander,
Beloved by all my crew ?
A really popular commander.
But now my kindly crew rebel,
My daughter to a tar is partial,
Sir Joseph storms, and, sad to tell,
He threatens a court martial!
Fair moon, to thee I sing,
Bright regent of the heavens,
Say, why is everything
Either at sixes or at sevens?
Fair moon, to thee I sing,
Bright regent of the heavens