The sunset colorizes the sunny side of all parts of the trees and other things it meets. Converting a photo to have realistic sunset light is unfortunately very difficult. No automatic filter can decide which parts of the image should be colorized - the image has no 3D information to decide the lit surfaces and shadows. The direction of the sun is not enough. You must be able to select the areas in the image which should be recolored.
In theory one can cheat by colorizing all in the sunny areas and let the shadows be what they happen to be, no matter the light direction can be radically off. That's used in my example, too.
Another problem is the sky. Sunset sky is different than the sky in the middle of the day. It probably could be copied from somewhere. Or one could create it with color and contrast adjustments or even paint it. But making a plausible selection or mask to change the sky is difficult, even impossible if the trees and bushes have much only few pixel wide details where the sky can be seen through.
At first in the bottom layer the original has got general contrast boost with curves + red is boosted even more. The idea is to make the sunset glow on the tree tops maximally bright:
There's an adjustment layer, because the effect is inserted with no reference. Adjustment layer can be readjusted when there's more.
That, of course cannot be global. A new copy of the original is inserted. It's made darker than the original, masked off in the middle and at the edges it's partially transparent because the reddish light must affect also to the parts with less direct sunlight:
The sky fades the red glow - it's too bright. A new sky is made with the Render > Clouds filter. It fades to black downwards - the watcher is assumed to look about eastwards where the sky is darkest in the evening.
The blue is quite dark, but clouds reflect some sunlight and make the not directly lit bushes still to have some color:
The mask of the sky is made by increasing the contrast. The sky must be masked, not the trees nor bushes. The fine details of them do not stand any shaving at the edges due the low resolution image.
The darkened sky looks offensive. In the next version it's opacity is reduced to 60% as a compromise: