crack of dawn

== English == === Pronunciation === === Noun === crack of dawn (plural cracks of dawn) (idiomatic) The first moment of daylight; the instant at which sunrise begins. Synonyms: ass crack of dawn (vulgar), butt crack of dawn (vulgar); peep of day, break of dawn, daybreak; sparrow-fart (Commonwealth slang); see also Thesaurus:dawn ==== Derived terms ==== ==== Translations ====