1) Aurora 2) Break of day 3) Break of the day 4) Dawn 5) Dawning 6) Daybreak 7) Dayspring 8) First light 9) First light of day 10) Hour 11) Morning 12) Sunrise 13) Sunup 14) The first light of day 15) Time of day Found on https://www.crosswordclues.com/clue/cockcrow