Translation phrase for "a moment of enlightenment or truth"

[don hoffend]

Can anyone help me with a common phrase meaning  "a moment of enlightenment or truth"

[James H Smith]

Am I being simplistic with:-

un moment d'éclaircissement ou vérité.

[don hoffend]

phonetically, something like: day-nu-mon ?

[Neil Coffey]

There's a word dénouement, occasionally used in English, but this really means "end", "solution" (as in "an end to the crisis", or "the play's ending was surprising"). I'm not so sure about the interpretation of "moment of enlightenment" as such-- I suppose very occasionally that might work, but it's not the basic meaning of the word.

[stu harris]

Surely dénouement literally means untying the knot -- so figuratively, it's the moment of resolution of a problem, conflict, crisis... and this is its normal usage.

[Neil Coffey]

Mmmmaybe -- but I'm not sure things actually happened that way round (i.e. I'm not sure that dénouement is really used much in any "literal" sense of untying -- I think it just derives directly from dénouer already in its figurative sense).

[Ian Jones]

How about 'épiphanie'