Daybreak and Wee hours

Daybreak noun - The first appearance of light in the morning or the time of its appearance.

Wee hours and daybreak are semantically related In some cases you can use "Wee hours" instead a noun "Daybreak".

Daybreak and wee hours are semantically related in dawn topic. You can use "Daybreak" instead a noun phrase "Wee hours", if it concerns topics such as beginning of day, first part of the day.