break_of_day
1. [ noun ] the first light of day
Synonyms: dawn daybreak dawning dayspring first_light aurora break_of_the_day sunrise sunup cockcrow morning
Examples:

"we got up before dawn" "they talked until morning"

Related terms: sunset hour
Similar spelling:   break_off
  break_of_serve
  breach_of_duty
  break_open
  Breakfield
  break_bread