Converting a daylight shot into a credible night scene takes quite a bit of skill / practice / etc. Lots of subtle visual cues to its daylight origin can easily slip unnoticed by even experienced Photoshoppers. The search that Sam suggested turns up lots of useful hits.
There have also been quite a number of threads on this site that discuss such cues in the context of producing various dark, fantasy composites from daylight stock images. Googling {composite shadow light source site
hotoshopgurus.com} and similar searches will turn up quite a few of these threads. Many have appeared in our Graphic Design Showcase. I heartily recommend you read through some of them.
Mike's suggestion to try some canned effects in 3rd party plugins like the Topaz, Tiffen, and NIK suites of tools is also a reasonable approach. Unfortunately, although quicker than completely manual approaches, the results of such global transformations are rarely as good as a manual approach by a skilled 'shopper.
Towards this end, I threw together an example of the sort of results you might expect using the plugin approach. My first step was to take the photo into ACR, turn it blue, darken it, and try to deal with the very broad, unconvincing bright background. The result of processing in ACR is shown in the first attachment, below.
Next, I took it into PS, and used the night-into-day + several other filters from the Tiffen DFX package, followed by a pass through Topaz Re-Style. The intention of the latter was to change the uniform blue look into one that simulates the mixed lighting sources (often orange tungsten lights) that pervade night scenes.
Finally, since you are obviously not the copyright holder of this image, I restored the copyright notice from an apparent legal licensee, wallpapercraft.com, of the image from the band. This is shown in the second image attached below.
The above only took me about 10 minutes, and it shows, LOL, but doing it from scratch would have taken more time than I have available. Doing a quick-and-dirty version like this can also serve as a suitable starting point for further manual manipulations.
Cheers,
Tom M
