Usage patterns
夜明けを迎えるto greet the dawn / to reach daybreak
The climbers greeted the dawn at the summit.
夜明けとともに〈動詞〉to do something as dawn breaks
The birds began to sing as dawn broke.
夜明け前に〈動詞〉to do something before dawn
〈事〉の夜明けthe dawn (beginning) of something, used metaphorically for a new era
This is the dawn of a new era.
Expressions
夜明け前が一番暗いit's always darkest before the dawn; the darkest hour is just before the dawn