And yet another way to skin that cat...
My main DID is pointed to a phantom with two forward paths. Day forwards immediately to the STAR, night forwards immediately to the night auto attendant. Normal operation is receptionist does nothing, STAR handles day/night and holiday greetings. If they need to leave early, they put the system into night mode and the night greeting plays.
In case of inclement weather or a last minute decision to book out early for the holiday, I call into the Configuration Assistant and forward the phantom to the appropriate application. It takes about 30 seconds on my cell phone, because I always seem to be out of the office when they need it changed.
The phantom came about because my redundant SIP trunks are off-node, so day/night Call Routing Tables wouldn't work. The remote forwarding via Configuration Assistant was an added bonus.