Magic hour is a favorite time of day for many photographers. Magic hour occurs twice a day. The first is the 30 minutes before the sun rises and ends 30 minutes after the sun rises. The second is 30 minutes before the sun sets and ends 30 minutes after it sets. During this time the light from the sun becomes softer and spectacular colors become available.
However, as magic hour progresses the lighting changes. This means that you may want to plan your pictures around certain times of magic hour.
To demonstrate lets take a look at 4 pictures of Mt. Baker all taken within 21 minutes of each other.
This first picture shows Mt. Baker with the sunset about halfway down. Here the lighting has a pink hue that makes so many sunset pictures spectacular.
Six minutes later the sky still has the pink colour but baker itself is now back to a more natural colour.
15 minutes later the moon has risen , the sky only has a hint of purple left.
Only 1 minute later the sky is nearly black.
As we can see, during magic hour the lighting goes from casting colored hues to being nearly black. This gives a lot room to creativity shoot a subject in different lighting in just 30 minutes.