firefly moment
n.β Β«Guests of the Womenβs Resource Center enjoyed Embracing Firefly Moments at the Plantation Golf and Country Club with author/speaker Barbara Braunstein. Barbara kept the attendees in stitches with humorous anecdotes and lessons on how to watch for those brief-but-special moments in life that she likes to call “firefly moments.” Among her books: “Help: I Have It All, But I Have No Lifeβ”Make Up Your Mind, Not Down” and “Firefly Moments.”Β» ββGuests savoring special moments” Sarasota Herald-Tribune (Florida) Dec. 3, 2008. (source: Double-Tongued Dictionary)
In geek circles, that term is easily mistaken for this:
http://www.mutantreviewers.com/r10firefly.html