There are two official golden hours each day – the hour after sunrise and the hour before sunset. In both cases, the sun is very low in the sky and casts a golden light over the landscape. In this tutorial we’ll show you a quick way to recreate this golden glow on the computer should you have not been fortunate enough to capture it in-camera.

http://www.digitalcameraworld.com/2013/01/28/how-to-fake-the-golden-hours-in-photoshop-even-if-you-shot-a-jpeg/