Who said "I've had a bad day, but that's not important."?

This quote is attributed to Kurt Vonnegut.

I've had a bad day, but that's not important. - Kurt Vonnegut

"I've had a bad day, but that's not important."

Kurt Vonnegut

Novelist American 1922–2007

"And I urge you to please notice when you are happy, and exclaim or murmur or think at some point, 'If this isn't nice, I don't know what is.'"

"Everything was beautiful and nothing hurt."

"We are here on Earth to fart around, and don't let anybody tell you different."

"So it goes."