The accident occurred at dawn. ✬

We got up at dawn. ✬

I was woken up suddenly at dawn. ✬

We got up at dawn to avoid a traffic jam. ✬

We must get up at dawn. ✬

The enemy attack ceased at dawn. ✬

The enemy's attack ceased at dawn. ✬

The soldiers got to the foot of the hill before dawn. ✬

It gets extremely cold toward dawn. ✬

The dawn is breaking. ✬