No, one poster said that. Doylem, gnd, and I are referring to the afterglow following sunset, not golden hour itself. Once the sun has set, golden hour is over. It's still daylight photography so long as the sun is still in the sky.
For example...
(both clickable)
GOLDEN HOUR:
AFTERGLOW:
Both are good times for photography and give very different results. During the afterglow, there is still blue in the sky, but the sun has set and is no longer shining direct light on anything. All of the light is then ambient, reflecting off of particles in the sky, or else it's artificial (manmade lighting). It's when the sky becomes completely black that photos start to loose visual interest.