Night Procedure (or "Is Not Day") does not work.

I've been having difficulty trying to work out a procedure that detects if it is night. 

Is Not Daytime 

doesn't work for some reason (ill give specifics if needed)

I tried also doing a: 

Get World Time > 13000 AND Get World Time < 23000

But that doesn't work for future nights that go beyond the time 23000

Currently I'm trying to make a procedure that turns an entity transparent during the nighttime. Any way I can do this?