Using 10.3.9 on a sawtooth G4 400mHz
Date and Time are grayed out, so I can't reset them. It's been a long time since I had this problem, so forgive me for posting this here.
Actually, this was one of those "duh" moments for me. The choices were grayed out because my machine could not connect with the server to update the time. It seems that the ethernet jack was loose -- not plugged in securely -- so no connection could be made.
No Airport here.