on the eve of

on the eve of (something)

Immediately prior to something; just before something. Sometimes literally meaning "on the evening before (something)." Militants attacked the embassy on the eve of the anniversary of the historic peace agreement. She got cold feet on the eve of her wedding and got on a plane to Europe.
See also: eve, of, on
Farlex Dictionary of Idioms.

on the eve of something

Fig. just before something, possibly the evening before something. John decided to leave school on the eve of his graduation. The team held a party on the eve of the tournament.
See also: eve, of, on
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

on the eve of

Just prior to, as in On the eve of the conference the main speaker backed out. This expression uses eve, literally "the night before," more loosely. [Late 1700s]
See also: eve, of, on
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • (I) wouldn't (do something) if I were you
  • a/the feel of (something)
  • a straw will show which way the wind blows
  • a crack at (someone or something)
  • all right
  • (you) wanna make something of it?
  • all for the best
  • a thing of the past
  • a slew of (something)
  • a bird in the hand