The time of day known as "twilight" occurs before sunrise and after sunset. It is also known as the "Golden Hour". It is when the sun is below the horizon, but still shines on the lower atmosphere. Add clouds and it makes for a beautiful sky. We had one sky the other night here in Mount Vernon, Washington. This image was taken at 10pm. The sun had set just minutes before. The white lights at the bottom is the city of Burlington, Washington.