It's sunup.

Just before sunup.

We'll move at sunup.

Sunup at O.K. Corral.

We'll go charging' in about sunup.

It ought to be sunup about now.

If I'm asleep at sunup, wake me.

We be out. We be out by sunup.

That'd been me, I'd have stayed till sunup.

He'll be there half an hour after sunup.

Then they'll come around some cold morning, just before sunup.