Sourced Day/Night on maps?

[Zop]

So i posted [Here](http://www.touchofdeathforums.com/smf/index.php/topic,58214.msg616072/topicseen.html#new)
With a request about scripting it and was pointed to sourcing it in.
So basically, How would i make it so that on say…
map X it was night time
On map Y it was Day time
and on map Z it was still following the time in eclipse (So it'd switch between day and night depending on the time)

So yeah, how would i go about doing that in source?