Quotes about goodnight
A collection of quotes on the topic of goodnight, kiss, day, going.
Quotes about goodnight

“Vivian Stanshall, about three o'clock in the morning, Oxfordshire, 1973, goodnight…”
Tubular Bells: The original version of the Sailor's Hornpipe
Others

“Goodnight Mrs. Calabash, wherever you are.”
Famous sign-off line to all his radio and TV shows, the meaning of which he never publicly revealed, leading to much speculation and many theories. Only after his death did it become public knowledge that it was reference to his first wife, Jeanne Olson, who died in 1943, and that Calabash was a private name between them for Calabasas, California, where she spent much of the final years of her life.

“Goodnight sweet prince, may flights of devils wing you to your rest.”

“Everyone winds up kissing the wrong person goodnight.”
Variant: Everybody winds up kissing the wrong person goodnight.
“HOBBES:
If you don't get a goodnight kiss you get Kafka dreams.”
The Authoritative Calvin and Hobbes
Source: Faking It

“Let it die. Let there be a new beginning. It’s awful. Goodnight.”
Part 4, section 28. The last lines of the novel.
The Cunning Man (1994)
Context: "Can you tell me the time of the last complete show?"
"You have the wrong number."
"Eh? Isn't this the Odeon?"
I decide to give a Burtonian answer.
"No, this is the Great Theatre of Life. Admission is free but the taxation is mortal. You come when you can, and leave when you must. The show is continuous. Good-night."

“(Typical signoff) Goodnight, and have a pleasant tomorrow.”

Lullabye (Goodnight, My Angel).
Song lyrics, River of Dreams (1993)

“I need
a lullaby
a kiss goodnight
angel sweet
love of my life
o, I need this”
Song lyrics, Ophelia (1998), My Skin
It's commonly believed that at the end of stage shows Allen would reply to George Burns line "Say goodnight, Gracie", with "Goodnight, Gracie". Recordings from the time do not have her using this reply.
Disputed

1960s, State of the Union Address (1966)

Lullabye (Goodnight, My Angel).
Song lyrics, River of Dreams (1993)

2000s, Democratic National Convention speech (2008)
“Crank is to coffee what sexual homicide is to a goodnight kiss.”
The Redneck Manifesto: How Hillbillies, Hicks and White Trash Became America's Scapegoats (Simon & Schuster, 1997)

Closing remark to the Presidential debate with Mariano Rajoy in the 2008 election campaign.
As President, 2008

Source: "Goodnight!", in Lamia's Winter-Quarters (London: Macmillan and Co., 1898), p. 163.