I feel as if we should have a mod that allows Day & Night to take place during playing on a map.
The Day & Night would have 8 lighting modes and 4 Skybox modes.
The lighting would change every 5 minutes to the next lighting mode and the Skybox would change every 10 minutes to the next Skybox mode.
I have uploaded a Chart of the cycle:

I believe this can be done with Timers, "If"s, And Skybox, and Sun Datablock Property Changing.
This should work on ANY map, and can be modified of its properties on the RTB Server Options Tab. Such as:
Switch modes every: 1 - 5 Minutes
Day Skybox: [Directory of the Skybox]
Night Skybox: [Directory of the Skybox]
Morning Skybox: [Directory of the Skybox]
Sunset Skybox: [Directory of the Skybox]
Day and Night Cycle Enabled: [Checkbox here)
When the cycle is complete it will reset and start all over again.