They had an hour to go before the first light of dawn.

At the first break of dawn he was away again.

You can get up at the break of dawn and hit the computer.

But before the light of dawn, we were upon our way.

The first light of dawn was already strong in the east, but they had made good enough time.

He was up and away with the first light of dawn.

But he was up before the first light of dawn.

Three hours to go to the first light of dawn.

But in the morning with the light of dawn everything would change.

It would be gone with the break of dawn, never to return.