Technically, "dusk" is the period of twilight between complete darkness and sunrise (or sunset). In common usage, "dawn" refers to morning, while "dusk" refers only to the evening twilight.

Which one is dawn and dusk?

The morning twilight is often called dawn, while the evening twilight is also known as dusk.

What is difference dawn and dusk?

In general terms the dusk marks the end of the day while dawn marks the beginning of the day. ... However, the main difference is that dusk is the twilight before sunset while dawn is the twilight before sunrise. Furthermore a civil dusk marks the beginning of the sunset while a civil dawn marks the end of the sunrise.