epiphany
noun /ɪˈpɪfəni/
  /ɪˈpɪfəni/
 - (also Epiphany)[uncountable] a Christian festival, held on the 6 January, in memory of the time when the Magi came to see the baby Jesus at BethlehemTopics Religion and festivalsc2
 - epiphany[countable] a sudden and surprising moment of understanding
- She had an epiphany and realized it was time to leave her job and become a full-time artist.
 
 
Word OriginMiddle English: from Greek epiphainein ‘reveal’. The sense relating to the Christian festival is via Old French epiphanie and ecclesiastical Latin epiphania.