Predawn (adjective)

1. Occurring or happening just before dawn.
2. Referring to the time period just before the sun rises.

Origin:

From pre- + dawn.

Examples:

1. The predawn light was just starting to filter through the trees.
2. She woke up early to watch the predawn sky turn from black to pink.
3. The predawn joggers were out on the streets.
4. The predawn silence was broken by the sound of birds chirping.
5. He had a predawn flight to catch, so he had to wake up early.