“Time flies when you are anxious!”
Unwanted Thoughts Syndrome (2009)
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Maria Bamford 18
American actress and comedian 1970Related quotes
The Angelic Angleworm (p. 70)
Short fiction, From These Ashes (2000)

“Time flies like an arrow. Fruit flies like a banana.”
No known citation to Marx. First appears unattributed in mid-1960s logic/computing texts as an example of the difficulty of machine parsing of ambiguous statements. Google Books http://books.google.co.uk/books?client=firefox-a&lr=&as_brr=0&q=%22fruit-flies%22+%22time+flies%22+banana&btnG=Search+Books&as_drrb_is=b&as_minm_is=0&as_miny_is=1900&as_maxm_is=0&as_maxy_is=1970. The Yale Book of Quotations dates the attribution to Marx to a 9 July 1982 net.jokes post on Usenet.
Misattributed

“On the wings of Time grief flies away.”
Sur les ailes du Temps la tristesse s'envole.
Book VI (1668), fable 21.
Fables (1668–1679)
Variant: Sadness flies away on the wings of time.

“Sadness flies away on the wings of time.”

“Time is short and the days are sweet and passion rules the arrow that flies.”
Song lyrics, Empire Burlesque (1985), Dark Eyes